Computer Support Forum

PCI Serial Device Controller Unknown Device for WIndows 2003 server on 6072 BH7

Question: PCI Serial Device Controller Unknown Device for WIndows 2003 server on 6072 BH7

My thinkcentre M57 6072 BH7 (not sure if it is M57 but I just got 6072 BH7 from label on the machine) has windows 2003 serverinstalled. I installed all the drivers from DVD comes with. However, there are 3 remaining devices that cannot be installed: PCI Serial DevicePCI Simple Communications Controller (there is no modem installed)Unknown Device I was trying crazy to download the drivers for AMT and HECI but most of them do not work on WIndows 2003 server. I also tried the newest flash BIOS with no luck. Anyone has any ideas? Thanks in Advanced and I really appreciate any help.

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Preferred Solution: PCI Serial Device Controller Unknown Device for WIndows 2003 server on 6072 BH7

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Answer: PCI Serial Device Controller Unknown Device for WIndows 2003 server on 6072 BH7

what are the hardware IDs of each device? this can be found in each device's properties under the details tab.

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Can't find the drivers for the above mentioned devices.

Answer:OptiPlex 790 Universal Serial Bus Controller,Unknown device drivers for Win 7 pro 64-bit

Intel Chipset driver
Intel Management Engine
Intel AMT
NEC USB 3.0 Driver

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Hi there! I've installed WinXP Pro SP3 (unattend) on a new T400 and i've got some unknown devices.  Screenshot from the device manager SystemUpdate from Lenovo has turned off (Mai 09) an I'havent any idea wich devices I've forgot to install. Do some one have any ideas? Thank you and for any help!Message Edited by fishware on 05-06-2009 11:19 AM


Go to Solution.

Answer:T400: Base System Device, PCI Serial Port and Unknown Device

Sulotuion:PCI Simple Communications Controller: Serial Port: System Device: Unknown device: you for mental help :-)

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Hi Friends
in my win7 i have this unknown device

i have another windows 8.1 and there is no unknown device. this means It's only in windows7.

please help me to solve it. because i think this problem bring some error in HDMI.
when i use Laptop I haven't any Lag, but after connect with HDMI to TV, Lags appear.even in Game & Movies.
& ONLY in windows 7. no in windows 8.1.


Answer:"Universal Serial Bus (USB) Controller" Unknown in Device Manager Win7

Friends i solved it. it was USB 3 bug. i again install usb 3 driver , restart windows , and ok all.

anyone know about my problem HDMI & Lags?


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Hi, In My lenovo G450- with Intel Chipset - 3GB RAM (no external graphics card),am seeing a Unknown Device with question mark on device Manager, running on Win XP. Further clicking on Device properties tell me that -Device type : Other DevicesManufacturer: UnknownLocation : On Microsoft ACPI- Compliant Embedded Controller. I have installed all the drivers and have not installed any external devices like USB etc.Am not getting which device this could be. Network Controller also shows with question mark even after installing Broadcom Ethernet Driver for XP. Kindly help me what to do?Is there any order where we need to install the drivers.


Go to Solution.

Answer:Unknown Device & Network Controller in the Device Manager for Lenovo G450

re-install power management and ethernet drivers.

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hie i have just installed window 7 and this devices are missing, any help will be very much appreciated.
base system device
device id


LOCATION; PCI bus 0 device 2 function 1
PCI\VEN 8086&DEV_3582&SUBSYS_120E10CF&REV_02
My laptop is FUJITSU-BIBLO MG13D

Answer:base system device, video controller and unknown device missing

Before I can help you, follow these instructions to let me know more about it: New to SevenForums? Fill out your system specs (this tool may help you out a great deal).

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Please help:
I can't get this computer to run the files for the drivers(Zipped files). I have 7-Zip to open them.
Thanks for any help.

Answer:yellow ! on Video controller and. ? on multimedia Audio controller, RAID controller, and an unknown device

Just to add, I tried updating the drivers but windows won't run the downloads.

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Can't seem to get my Xbox Wireless Controller to install. anyone else having any issues?

on the website there are only windows 7 drivers. it says windows 10 already has them bundled...

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i was told by Sony support on theit chat support to take my sony vio VGN-NW20EF bact to factory settings due to the disc drive not working, i done this, now the lap top does not see my Novus when i plug into the USB, worked before, other usb connections are working ok, i am now confused

Answer:serial usb controller not seeing device

What is a Novus ?Does it need its own instillation and drives?If it is a remote temperature and environment monitor, it is not a standard feature of your Toshiba. It is not a simple USB device. The device  and has its own instantiation software. Do the install again, using the CD that came with that USB external controller.

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Hi I have problem with drivers : PCI Device and Bluetooth controller & Universal serial bus controller in( Device manger) can any one suggest me how to over come this problems In my laptop

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I upgraded to Windows 10 a while back. Every time I open the computer I get a pop-up notification telling me the USB device is unrecognized. I have no USB devices in any of my 3 USB ports.
I sent my computer in twice. No help. They just uninstalled everything and reinstalled everything and told me it should be fixed. It is not. I then went about updating every driver in my Device Manager. I uninstalled the Unknown USB Device and then updated
other drivers. Certain drivers (such as PCI Express Root Port #3 - 9C14) when updating would also reinstall the Unknown USB Device, which I would then uninstall and keep working down the list. At the end of updating EVERYTHING I scanned for hardware changes
and "found" the Unknown USB Device. 
From what I can tell, and I know very little about this stuff, my computer can't name one of my USB ports. Since it can't figure out what it's called it can't download the proper driver for it. Since it can't download the proper driver it can't work properly.
The practical result from this is that one of my three USB ports does nothing when I put in any USB item (connect my android phone, thumb drive, presentation clicker, etc).
I've looked on tons of forums. My current thought is that if I can tell my computer what the deice is or download the right driver and tell my computer to use that driver for this device it should solve my issue. But I don't know how to know what the name
of the USB port should be (I imagine it woul... Read more

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HELP!!! Dear Sirs, I have Lenovo ThinkPad T60 Type 8744-4XG. After installation WINDOWS 7 and after installation all modern device drivers ( BIOS v. 1.18), in device manager I have a warning: !!! unknown device Intel 82801GBM (ICH7-M) LPC interface Controller - 27B9 Where I can find device driver for Intel 82801GBM (ICH7-M) LPC interface Controller - 27B9 for WINDOWS 7 ? I find it only for WINDOWS XP and for WINDOWS 2000 In automatic mode in INTERNET the system can not find this driver. Does it exist for WINDOWS 7 ? Please help! I have installed Intel SSD 160Gb drive to my Lenovo T60 and now it is very fast notebook! But it is not normal if the last driver do not installed in the system (All other drivers was successfully installed) Thank you in advance  


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Answer:Lenovo T60 WINDOWS 7 unknown device Intel 82801GBM (ICH7-M) LPC interface Controller - 27B9

Hello, That appears to be part of the Intel chipset, so my first suggestion would be to try installing the Intel chipset driver software.  The latest version can be found here on Intel's support web site. Regards, Aryeh Goretsky 

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There is a yellow triangle next to this device. When I ask Windows to install or update the driver, it reponds with "Windows could not find driver software for your device. ..."

When I right click on the device and then click Properties / Hardware IDs this is what I see


When I click on Compatible IDs I see this:


The location information is PCI\VEN_1106&DEV_3432&REV_03

The location information is PCI\VEN_1106&DEV_3432&REV_03

The location information is PCI bus 3, device 0, function 0

Physical Device Object name is \Device\NTPNP_PCI0017

How can I make the yellow triangle go away?

Answer:Device Manager - Other Devices - Universal Serial Bus (USB) Controller

Welcome to the forum.

What motherboard are you using?

From the information you have provided, it appears that you need the driver for USB 3.0 provided by VIA.

I would check the web site of the motherboard manufacturer or your motherboard install disk.

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Have these above drivers missing -  managed to solve PCI Simple Communication Device missing driver by downloading  some drivers from HP Support and running these from 'command prompt (Admin)' with them running in Win 7 compatability Mode.  What driver(s) do I need to run to overcome this or where else should I look to resolve. 

Answer:Win 10 PCI Serial Port & PCI Unknown Device Drivers misiing

Hi: For the PCI Serial Port you need this driver... This package contains the Intel Local Management Service (LMS) and Serial-over-LAN (SOL) support for Intel Active Management Technology (AMT) for the supported desktop models and operating systems. This software is part of the Intel Digital Office Initiative. Please post the hardware ID for the PCI Unknown device you are missing the driver for. To find the hardware ID, go to the device manager and click on the unknown device needing the driver. Then click on the Details tab at the top of the device window. Now you will see a Property drop down list, and it will be set to Device Description. Drop down on that list and select the 3rd item (Hardware ID's). Post the top string of characters that you see in the window.

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hi,I installed a new hd on my dell latitude e5420 laptop today and installed a fresh copy of win 7 pro 64.
I got all my windows updates and then began instaling drivers from the dell site.
but i have two messages : driver not installed on universal serial bus(usb)controller and
driver not installed on unknown device.
the chipset driver has been installed and I can't figure out how to find and install these two drivers.
Any help appreciated.

Answer:missing universal serial bus driver and unknown device

You missed one, download them all again and go one by one.
If you're able to extract the actual Driver files directly then just naviate to it from the Device Manager and update.
Things like these are tricky at times and require lots of manual work. Create one folder with all the drivers and start opening them one by one. Then move them over to another fold once you're finishied.
I like to download them and name them what they actually are. Makes it easier to track.

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I don't see ports menu in device manager.Also, the USB serial controller entry is missing from the device manager menu under USB entries.I need to install a 3D printer driver that connects via USB. However, its driver does not get loaded. The printer devices shows itself under other devices without driver and does not accept many drivers that I have tried.Thanks

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i have problems with sm bus controller... all other drivers i got and that one not :S
i got : AMD Turion 64 mobile techinology . ml-30 processor
Ati mobility radeon x700 graphics card .
computer name: Acer TravelMate 4402 Lmi .
Can someone help me?
i have searched alot on google etc but finded nothing.

Answer:SM Bus controller, unknown device

The SM Bus is not very important as you make work normally even if it is not installed. For you to find it simply go to where you will get all driver for you acer. Simply select the appropriate for your laptop and windows and you will get all driver for your laptop.

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Just did a fresh install of windows XP Pro. upon reboot. SM Bus Controller in device manager is not recognized. I have found out that this is due to the chip set drivers not being installed.

I have found out my mother board and chipset details using Everest (Cool Application).

Motherboard Name: Asus A7N8X-LA
North Bridge: nVIDIA nForce2 IGP (Crush18)

how the hell do I go about getting the correct drivers? I've looked on nvidia webset but theres no references to nForce2 IGP

Please help.

Answer:SM Bus Controller - Unknown Device

The question is what graphics chip nVidia is using. Could you please copy everything Everest reported about North Bridge: nVIDIA nForce2 IGP (Crush18)

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Ok, I have a new SL300 and I installed a NEW Hard Drive and installed windows XP Pro CLEAN. I got ALL the drivers up and running with ONE exception. There is an UNKNOWN Device in the device manager and I can't seem to find what it does. Looks like everything works on the system. I also can't seem to get the Intel 5100 software to control my wireless card. If anyone has any ideas it would be very helpful! I ran a utility for unknown devices and that didnt find it either.

Answer:Windows XP Clean Install New Hard Drive UNKNOWN DEVICE IN DEVICE MANAGER! HELP!!!!!

what's the hardware ID of the device?   you can find this in device manager (start > run > devmgmt.exe). have you installed thinkvantage system update to see if it finds the missing device?

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I need help for eliminate error in Device Manager. Error code: 43 in Unknown Device row.
Thanks for help
Link to image
Moderator note: images totalling more than 50k converted to links per forum rules:  Lenovo Community Participation Rules

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I have two of each after formating the pc and installing windows 7 ulthow do i figure out what these are?

Answer:sl500 drivers windows 7 base system device and unknown device

They must be the Ricoh card reader drivers.Have you installed thinkvantage system update?

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I have Windows 7 Ultimate. Since very recently an unknown device keeps popping up in the device manager every time I start Win. It's reported location is within the front USB root hub but I haven't changed there anything lately. The device status reports "Windows has stopped this device because it has reported problems (Code 43)". I can uninstall/disable it but it will get picked up again the next time I reboot. All other usb devices (mouse, keyboard, web camera, APC UPS, external drive, printer) work fine. How do I get rid of this nuisance so that it doesn't reappear?

Answer:Unknown device: Windows has stopped this device because it has reported problems (Cod

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Hi guys, I have a big problem....
I have a game controller Dialog 13-VR ( DIALOG company, ltd. )
and when I connect it to usb port it apears like this >

When I go to Device Manager it apears like this >

And when I try to install the driver it shows me this >

What to do ? Any ideas ?

Answer:Unknown Device (Game Controller)

Use 7 driver if you can find one. If not, install the Vista driver in compatibility mode for Vista. Compatibility mode may cause it to install correct and recognize the device. Good luck.

If still no go, install by right clicking on that unknown device and choose update driver software. Browse my computer, let me pick, have disk, browse. Now find the .inf to the driver. Extract driver contents from rar or zip file beforehand if need be. Or if install file is .exe, let it extract to temporary folder first by running it. Then install with device manager as I said.

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I had an "unknown device" show up in devices and printers a couple days ago. It was also listed in device manager and said it was a USB controller. Everything worked and I've not added any new hardware. I have 2 partitions both with Windows 7 and the error showed in both. I've found that others were having the same issue, some needed drivers, some said cables needed replaced. Before I got serious with the troubleshooting, I read up a little and found a forum that said you should shut down then disconnect the power cord, wait a couple minutes then power up. Sometimes the motherboard needs to reboot and the devices will be reloaded or reassigned as they should be. It worked for me, it was an easy fix to an annoying problem. Since so many people have posted about this I thought I'd share this. If it helps, great. If not, it didn't cost much time or any money.

Answer:Unknown device-USB controller not recognized

I can confirm this solution. I had the same problem and I turned off the computer, unplugged the power cable then plugged everything back in and restarted and the error message was gone. Finally!!! No more "Unknown USB Device" messages.

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Hi! I have SM bus controller as an unknown device in Device Manager. What is this SM bus controller and what are the necessary drivers?

My pc specs:
CPU Type AMD Sempron, 1800 MHz (9 x 200) 3000+
Motherboard ASRock K8NF6G-VSTA (2 PCI, 1 PCI-E x1, 1 PCI-E x16, 1 HDMR, 2 DDR DIMM, Audio, Video, LAN)
Motherboard Chipset nVIDIA nForce 6100-405, AMD Hammer
System Memory 2048 MB (PC3200 DDR SDRAM)
BIOS Type AMI (03/03/07)
Video Adapter NVIDIA GeForce 7300 LE (512 MB)
Audio Adapter Realtek ALC883 @ nVIDIA MCP61 - High Definition Audio Controller
Disk Drive SAMSUNG SP2504C (250 GB, 7200 RPM, SATA-II)

Answer:Solved: Unknown SM bus controller device.

go here, pick your os ........... then d/l the "all in one driver package" and install ............(for xp)

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I was try to install Windows Server 2008 R2 64 bit on a A505-S6004 (originally Windows 7 Home Premium) on a new disk. Having downloaded and installed numerous Toshiba website drivers for Windows 7 and installing, I have two things left in device manager that I don't know what to get for them.
The info is under Other devices-Base System Device-PCI Bus 3, Device 0, Function1 and ..., Function2.

Any ideas what this may be?

Answer:Satellite A505-S6004 - Unknown device on Windows Server 2008 R2 64bit

It turns out I missed a driver, Ricoh Card Reader for Windows 7: rpn=PSAT6U&modelFilter=A505-S6004&selCategory=3&selFamily=1073768663#

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hi, heres my problem:

* USB 2.0 doesnt work when plug in to USB port. XP gives message Unknown USB device. USB has malfunctioned..

* from device manager here is my USB devices.

SiS 7001 PCI to USB Open Host Controller
SiS 7001 PCI to USB Open Host Controller
SiS PCI to USB Enhanced Host Controller
USB 2.0 Root Hub
USB Root Hub
USB Root Hub

I have SP2 installed, did reformat my hard drive and install fresh windows XP. all the drivers are up to date and even the BIOS.

What is causing this problem? Any help would be greatly appreciated...

PS. When i disable USB 2.0 Root hub and SiS PCI to USB Enhance Host Controller. The storage drives work in USB 1.1. My external usb drive is a HITACHI 10 G hard drive.

Answer:USB 2.0 storage device malfunctioned in Windows XP. Unknown Device!?!

recently I had a friend who expierienced the same problem with a Nforce chipset after a fresh install of XP with SP2. even though SP1 and SP2 insclude the drivers for USB2.0 his usb 2.0 devices werent working. he ahd to go to the Motherboard makers site and download the USB 2.0 drivers and then it worked.

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Just picked up an old A22m and none of the drivers on the support site seem to want to work for it. I'm looking for additional identification for the laptop and the only thing I can find on it is the type: 2628 - ttu Laptop specs:1Ghz, 384Mb, 28GbWindows 2000 I appreciate any and all help.  


Go to Solution.

Answer:A22m can not locate correct ethernet, serial port, and an unknown device's drivers.

Welcome to the forum! After downloading the drivers, have you unpacked them from the appropriate directory, for ethernet it should be something like: C>Drivers>Win>Ethernet... This is the correct Ethernet driver for your machine: Hope this helps. 

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Hello Forum,

I have a Inspirion 1150
Broadcom 440x10/100 network controller.

This is my problem:
In Device Manager,
I have 1 installed network controller that is running properly, but I have 1 that has a yellow ? with a !.
This is what it says:

Network Controller, in properties it shows the Manufacturer as "Unknown," and the Driver status says, "The drivers for this device are not installed. (Code 28)"
Location: PCI bus 2, device 2, function 0.

I have tried to un-install controller, it comes back.

What do I do with this "Generic" controller that has no name, I dont know what driver to look for because I dont know what it is.

Please Help...

Answer:Device Manager (unknown Network Controller)

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I have an M72e ThinkCenter, I reinstalled win 7 the corporate version and now I have two unrecognized device. Will someone help me find drivers for these. Also when I try to install the Management Engine this err msg appears: 'The setup program failed to startone or more application process' thanks

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After a clean installation of Windows 10, I get a series of Unknown Devices listed under "Other devices." When I run the update drivers option I get the message seen in the attached image.

Answer:Unknown Device reports bad host controller

Try grabbing and using this driver instead. Your other source may have been corrupt to begin with, or corrupted during download or after-processing. HTH,

Intel(R) N10/ICH7 Family USB Universal Host Controller - 27CB Drivers Download for Windows 10, 8.1, 7, Vista, XP

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I run an XP Home Professional. I am getting the message "No drivers installed for this device". When I follow instructions in "Device Manager" to check out this Standard USB Host Controller, I learn that the provider is MicroSoft. The driver date is 7/01/2001 and the version is 5.1.2600.0 and is signed by MSWindows Component Publisher.

I have checked everything I know how to look into and it appears that MS doesn't even recognize they issued this USB device. I need to either uninstall it and install one that will be recognized...or update this one providing I can locate one that can be downloaded. If there is a downloadable update, can you direct me to the location?

And I can't put my hands on the install disk.


Answer:unknown device-standard USB host controller

XP Home Pro ??? erm sorry but that don't exsist. Are you using a genuine Windows copy ??

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I'm really stuck, so I'd appreciate help if someone can give it.

I'm working on someone's computer. I should mention that I am doing this remotely, & I don't have another choice just now.

Due to a whole mess that with his computer, we needed to do a full destructive installation of windows. (XP Pro SP2)

Now, here's the problem. There were no USB devices listed in the device manager in windows after the new installation. There also aren't any unknown devices. There had been one, for audio, but I've fixed that.

The computer is older & the motherboard is a Microstar International MS-6738. I went to their site. i've run their live update multiple times but it just isn't finding anything missing regarding usb controllers and I did the 3 available updates for the motherboard. They didn't seem related, but i tried just in case. No luck, besides of course the audio working.

At this point I'm really at a loss. I feel like throwing the computer out the window, except I can't even reach it to do that! lol

Any ideas? Thanks for spending the time, for anyone who read this.
I did also run belarc advisor. If it would help, ask & i'll post it, as long as that's ok on this board.

Answer:no USB controller listed in Device Manager, no unknown

Have you actually plugged a usb device in???

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Hello, whenever I go onto device manager and then into "other devices" there are 4 devices that havent had a driver downloaded. The PCI device, the SM bus Controller and two "unknown" devices. What should I do? Please tell me if you need more information about my computer, ill be happy to provide.

Answer:PCI device, SM Bus Controller and two unknown devices not downloaded

Dell Support - Official Site

Select support for home.
On the next page, Enter your service tag or let it detect it.
On the next page, scroll down until you see (on the left) Get Drivers and Downloads.
Select the Analyze Now button.

After you are finished getting the drivers that you need. Uninstall all of that detection junk via the normal method of uninstalling apps in Programs and Features list.

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Hi everybody, I cannot install the Ethernet Controller driver, because it has an exclamation mark over a yellow background on device manger list.  That means card problem. But where the network cable plugs into the network card, the green LED light is on (solid). Does anyone know how to solve this problem? All the answers will be appreciated, my wireless modem signal has disappeared and I can't check the Ethernet connection. Loves and thanks, Alev

Answer:T60 Ethernet Controller Device type unknown !

Try here:

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After a clean installation of Windows 10, I get a series of Unknown Devices listed under "Other devices." When I run the update drivers option I get the message seen in the attached image.

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Hi, I have bought this Lenovo G580 (20157) laptop 2 years back. I had formatted my Laptop last night and installed Windows 7 Ultimate 32 Bit. Then i downloaded all the drivers from Lenovo Website. The Problem here is After installing all the drivers my Device Manager shows this YELLOW ICON as UNKNOWN DEVICE - NETWORK CONTROLLER. I tried all available options like trying to update the driver manually but still i am unable to find any solutions. I would really appreciate your effort on this which will be very helpful. 

Answer:Network Controller G580 (20157) - Unknown Device

hi kalhemhtc,
Welcome to the Forums.
Can you try one of these drivers:
Windows 7 - G580 (model 2689, 20157)

Wireless LAN Driver (CyberTan, Liteon) for Microsoft Windows 7 (32-bit, 64-bit) - G580 (2689, 20157)
Intel Wireless LAN Driver for Microsoft Windows 7 (32-bit, 64-bit) - G580 (2689, 20157)

If the above drivers doesn't work, can you follow this guide on how to identify the network controller from its hardware ID.
G580 : Wireless adapter is missing message when connecting to WiFi
Let me know how it goes.

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Hi there, I have a Lenovo Y510p with a frustrating problem. I've been having graphics performance problems and crashes for the last two weeks (suddenly unplayable FPS in diablo 3; hearthstone is barely responsive).  I was running windows 8.1, installed via the store upgrade, and thought maybe something had gotten corrupted. So I bought a student copy of windows 8.1 and tried doing a clean install of windows 8.1 followed by installation of the windows 8.1 drivers from lenovo's website.  same graphics problem So I went back to factory settings, doing the following steps: 1) Restore system using system restore one key recovery to original factory settings 2) Update all windows 8 files / drivers -> still have graphics problem3) Update to windows 8.1 via store4) Install windows 8.1 drivers from lenovo's website5) new problem I have have  Intel(R) HM86 LPC Controller - 8C49 showing as an unknown device in device manager.  Google searches suggest that this is part of the chipset, for which I have installed drivers.  I have not yet tested graphics performance until I resolve this issue. Any ideas what this is and, if it is part of the chipset, how do I successfully install the driver? Many thanks,Eric

Answer:unknown device Intel(R) HM86 LPC Controller - 8C49

When you state "Restore system using system restore" do you mean the Windows sytem restore or One Key Recovery system restore?

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I'm using:
HP Pavilion Notebook - 15-p251tx
Model #: L1K08PA
Serial #: [Personal Information Removed]
please give me the solution for the followings:
1. PCI Simple Communication Controller
Hardware IDs:
2. Unknown Device
Hardware IDs:
please recommend me the drivers for these two devices. Thanks.

Answer:PCI simple communication controller and unknown device probl...

Hi: You need these drivers for those devices... This package provides the Intel Management Engine Interface (MEI) Driver for the supported notebook models and operating systems. The Intel Management Engine Interface enables communication between the host operating system and the Intel Management Engine firmware. This package provides the HP 3D Driveguard Software (HP ProtectSmart Hard Drive Protection) for supported notebook models that are running a supported operating system. The HP 3D Driveguard Software protects the hard drive by parking the heads if the notebook is accidentally dropped, or is abruptly impacted by another object.

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Hi folks. I've installed Windows 7 on my Dell Studio Laptop. In the Device Manager, I have an unknown device showing, which reports as being Intel(R) ICH8M-E LPC Interface Controller - 2815Under System Devices, there is an identical device that has the correct driver installed. If I try to install the same driver for that device, the Unknown Device remains.I've also tried installing the following driver the device remains as Unknown.Can anyone help?My laptop is;Dell Studio 1735 : Intel Core 2 Duo T5750Graphics: 256 MB ATI Mobility RADEON HD 3650Memory Dual Channel 3.0GB (1X2GB + 1X1GB) 667 MHz DDR2 SDRAMHard Drive 250GB Serial ATA

Answer:Intel LPC Interface Controller - Showing as Unknown Device

I've already tried installing that Driver. Did a bit more digging and found out that it is actually the Infra Red receiver, and I've now installed the driver for it and the Unknown Device no longer shows.I installed the following driver for my machine. think the clue is in the Hardware IDsACPI\ITE8708, *ITE8708It's an ITE CIR receiver.

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Hello.I just reinstalled windows 7 32 bit on my compaq dc5800 and in the device manager said the pci simple communications controller needs a driver. This is the id code:PCI\VEN_8086&DEV_29D4&SUBSYS_281E103C&REV_02PCI\VEN_8086&DEV_29D4&SUBSYS_281E103CPCI\VEN_8086&DEV_29D4&CC_078000PCI\VEN_8086&DEV_29D4&CC_0780 Wired internet via ethernet is also not working, I updated the intel 82566dm-2 drivers but that did not work. 

Answer:pci simple communications controller unknown device and wire...

Hi: You need this driver for the PCI Simple Comms Controller... For the ethernet, the only suggestion I can offer would be to try the driver directly from Intel. The first driver on the list is for 32 bit.  

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I just installed Vista over XP and no I get this error code/problem in device manager = other devices, Ethernet controller, unknown device. It has yellow error codes here. I know that the Ethernet card works because I can use it with ubuntu on my other drive.

When I attempt to get a connection or diagnose/repair I get, '' local area connection network cable unplugged ''. This exact configuration get me on line in 5 seconds with ubuntu Linux but not with windows vista. Everything with the new vista install works fine except the other devices in device manager. I cant get on line to download new drivers with that computer...any ideas?


Answer:other devices, ethernet controller, unknown device issue

Maybe this can Help.

Check the Device Manager for valid network card entry.

If there is No valid entry, delete any Bogus Entry, and re-install the card's Drivers.

Check the Network connections to make sure that you have a Network Connection Icon/Entry, and that the Properties of the Icon (right click on the Icon) are correctly configured with TCP/IPv4 protocol in the Network Connections Properties.

Make sure that No Firewall is preventing/blocking the Wireless components to get to the Network.

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Hi there,As described in the header.I recently reinstalled my (recovery partition deleted long ago) Lenovo R60 9456-HTG. OS is Windows XP professional inc servicepack 3.At the same time I replaced the S-video controller of the laptop, since it was broken. I ordered a new one from Lenovo. To be clear, I replaced the part in which you insert the S-video plug, at the right side of the laptop, as seen from above.This new S-video controller doesn't seem to work, as no picture is being transferred to the television when I connect it. I am sure the problem is in the controller (or software), as the old S-video connector did work (crappy though, often no color). As soon as I start up my laptop now, the windows new hardware recognition tool tells me there is new hardware, but it is never able to update the drivers for it (not by automatic, internet, cd, manual searching, whatever). It then tells me the unknown PCI device found might not work properly. Using Sandra, Unknown device  or system tools (looking for yellor question marks) I cannot find any unknown  devices. Question is: How can I find out which PCI device Windows seems to be unable to find drivers for, after that, how do I find the driver, and last, is it possible that the PCI device unknown to Windows now is actually the new S-video controller (they changed the hardware maybe??? New driver needed for that???), or is that not a PCI device at all???  Best regards, Mathijs VosThe Netherl... Read more

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Hi all.  please see attached dxdiag for my system specs.  note that this is a big desktop PC
this morning i noticed a device in the device manger which isn't working properly. Normally  if it's not a major issue, i'd consider that sort of thing a silly nitpick.
However, i'm currently experiencing a major problem (which shall have its own thread, later), and i need to start eliminating possible suspects
i tried to research this little issue, and i found some steps that seem really good for major discrete components. unfortunately usb host controller is a generic entity, i'm not honestly sure if it even corresponds to any particular usb headers or external ports.
I've already tried the basic steps of disabling/enabling it, un/reinstalling the device, restarting the computer, leaving it powered off for five minutes, etc
anyways, details:
the device is listed under the Universal Serial Bus controllers section of the manager, as "Unknown Device"
When i open up the properties menu, i see the following info:
Device type: USB controllers
Manufacturer: (Standard USB  Host Controller)
Location: Port_#0001.Hub_#0003
Device Status: Windows has stopped this device because it has reported problems (Code 43)
going by instructions i found elsewhere, i was trying to hunt through the details tab for the hardware ID. Unfortunately that option only reports the value USB\UNKNOWN
so far, the only ray of hop... Read more

Answer:Unknown device in manager: USB host controller, Code 43

Well...the first thing I would delete all "controller" items under USB in Device Manager.  Not bother with "hubs" or any other listings, just the items with "conrroller" in the listed description under USB.
Reboot after removing all such.
Code 43 Errors

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My system speccy's should be in my profile bit, please let me know if you need more information.


Answer:Driver not found for unknown 'ethernet controller' in device manager.

Hi You need the Realtek Ethernet Utility .. In the Link below ..
Motherboard - P8H77-M - ASUS

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Heres the situation:

I installed a fresh copy of WIN2000 on my IBM Thinkpad A21m but I am having a problem setting up a device in Device Mangager. I have no idea what is going on.

When i reboot the laptop it prompts me that it has found a new piece of hardware and it wants me to install the driver for it. The problem is that I have no idea what device it is since all the devices that should be working are working - so i don't know what to do.

The clues that I have noticed that might help:

- the laptop takes a LOOOONG time to boot up (3 or 4 mins), and is sort of sluggish in operation (compared to how it ran when i bought it)
- my internet connection is super slow ( I have a DSL router that serves 3 computers incl. mine, the other two have XP and everythign runs smooth)
- the unknown device says it is located on the the "Microsoft ACPI-Compliant Embedded Controller"

Would any one know what Device this "Unknown Device" is??? I just need to know so i can install the driver so my system can run properly.



Answer:Unknown Device on Microsoft ACPI Compliant Embedded Controller?!?!

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Hi all,

i have updated my system to ultimate x64 sp1.

now in device manager, i found one unknown device(which is shown in Other Devices in Device manager), i tried most of drivers for it.

but not able to get it. i even do not know what device it is.

Please refer attached images.


Answer:Unknown Device on Microsoft ACPI Compliant Embedded Controller?!?!

DId you *upgrade* from 32bit to 64bit?

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After installing Windows 7 on my Thinkpad T43 I'm getting an unknown device on the following device: Intel(R) 82801FBM LPC Interface Controller - 2641.  Where can I go to get the correct driver?Thanks,

Answer:Unknown device: Intel(R) 82801FBM LPC Interface Controller - 2641

Have you installed Lenovo's ThinkVantage Windows 7 Client Security software yet?  In my case when I encountered this unknown device, it was the TouchChip Fingerprint Coprocessor Biometrics Device (Fingerprint Reader).

Life is just one big "Beta Test"Happy owner of a T43 (Windows 7) and T23 (Windows XP)

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Hello, Does anyone has an idea of what device driver should I download and install for the system to see this device? My system crashed and I had to restore it by reinstalling Windows XP; I have downloaded all possible drivers and tried to search the web, but I wasn't able to find anything helpful. My laptop is a Thinkpad T60 1952-WUU (Spanish) Thank you in


Go to Solution.

Answer:Unknown device at Intel(R) 82801GBM (ICH7-M) LPC Interface Controller - 27B9

I think you may be missing the S-ATA, Intel Matrix Storage Driver. You will find it, (click on hard drive), on this site along with all other drivers for your TP. 

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It says the location is " Intel(R) ICH9M-E LPC Interface Controller - 2917". I have downloaded tons of drivers USB, Processor, Tool Box, Bluetooth etc.. [IMG][/IMG]

Answer:T400s Unknown Device Intel(R) ICH9M-E LPC Interface Controller - 2917

I'm sorry.  So what is your question?

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I have thinkcentre M55 P/N is 8807-93U There is problem in installing driver with XP Pro. There is question mark in the device manager. It is said "Unknown device on Intel® ICH8/ICH8R Family LPC Interface Controller - 2810". When I took a look at resource, the unknown device is just undernearth system speaker and system clock. This issue has bothered me for a long time. Please help!!! Thank you

Answer:Unknown device on IntelĀ® ICH8/ICH8R Family LPC Interface Controller - 2810

I habe the same issue (XP, Service Pack 3) on ThinkCentre M55 (8811) but shown under "other devices". Device ACPI\BCM0102\1 Broadcom network-device driver is installed as well as "RAID" (SATA-driver) and Trusted Platform Module. The poor new support  sites do not show the Site "Unknown Devices after installing Windows XP with" and the search leads to anything else containing "unknown" or "device".No "Installing Windows XP on ThinkCentre M55." can be found but a manual how to upgrade to Vista. 

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Multiple users on windows 7 also programs running behind programs ie. Typing over top of mine. Unknown device appears to be server.

Answer:window 7 multiple users and unknown device possible server

you have to go into computer management and click on Shared Folders and identify all the shares. from there goto a command prompt as administrator.type at prompt: net share <share name> /deleteexample: net share ADMIN$ /deleteDo this for each share name and when you go back to computer management they will be removed from shared folders and shares

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I have the same problem and I am not good at PCCan you  show me , in detail , of where can I download that driver please?


Go to Solution.

Answer:Re: Device Manager - Other Device "PCI Data Acquisition and Signal Processing Controller"

welcome to the forum!
the driver that solved the author's issue can be found here:

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Hi,My M55e ThinkCenter was hit by a virus, an attack which required a new installation of my WinXP Pro (SP3) OS. When installation ended succesfully, a few hardware items stayed undefined. I solved most problems, but the following three are still unsolved:1. PCI Device2. Video Controller (VGA Compatible)3. Audio Device Where do I get the needed drivers? I searched the IBM site, but failed to identify the needed files. Ran

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Hi, I am using T410 for a couple of months. its camera was working but it has suddenly stoppped working now. in the Win7 device manager it appears as unknown device and in details: -"Windows has stopped this device because it has reported problems. (Code 43)"I have tried re-installing drivers and rebooting machine etc but no help. Please suggest how to fix this. Also tried reinstaling ehci controller device but no luck. Thanks,manu

Answer:Webcam not working on T410, detected as unknown device in Win7 device manager

hey manugautam000,welcome to the forums, disable to camera from device manager and remove the current driver installed to it.reboot your unit, re-enable the camera. windows should then install its own generic drivers.test your camera with the generic drivers.later on, head to , download the latest camera driver for your unit. set your unit to diagnostic mode via msconfig and then install.

WW Social MediaImportant Note: If you need help, post your question in the forum, and include your system type, model number and OS. Do not post your serial number.Did someone help you today? Press the star on the left to thank them with a Kudo!If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! Follow @LenovoForums on Twitter!Have you checked out the Community Knowledgebase yet?!How to send a private message? --> Check out this article.

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Thinkpad Yoga 20CD-0032USWindows 8.1 as pre-installed In the Check Up tab of Lenovo Solution Center it has an alert saying one or more devices has problems and then it lists an Unknown Device with Status Not installed.  However when you launch Device Manager it doesn't show any unknown devices.


Go to Solution.

Answer:Lenovo Solution Center Shows Unknown Device But Device Manager Doesn't

Welcome to Lenovo Community Forums!
I?m sorry to inform that it is a false indication from Lenovo solution center. Since Windows doesn?t detect any missing device drivers within the device manager, there is no driver that is missing.
If the warning keeps popping up, change the reminder settings to ?never?. Probably, you have to wait for an LSC update in which the bug would be fixed.
Refer here for further information regarding the issue.
Hope it helped!
Best regards,

Did someone help you today? Press the star on the left to thank them with a Kudo!If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.Follow @LenovoForums on Twitter!

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i have this unknown device that need to install the driver on my Y430 any help will be appreciated?  


Go to Solution.

Answer:Y430 - device instance Id : ACPI\CPL0002\3&11583659&0 - unknown device

It may be CIR driver.

//help will save the world

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I have installed Vista on my Satellite A100-771. I have also installed all the drivers downloaded from the Toshiba Support site.
But when Vista starts, one message come out always ----- new hardware founded. I really don't know which hardware it is.

There is a unknown Device in device manager, and windows cannot find the driver for this device online.

Can anyone help me?
Thanks a lot!

Answer:Vista on Satellite A100 - Unknown device listed in device manager

Hi there,

may I ask you which drivers you?ve downloaded? And regarding the new founded hardware: Did you checked your device manager for that device?
What is standing there as the non-installed device? Mass-storage or multimedia? Please be more precisely with your explanation and don?t forget the drivers to list.


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hello all. i dont come around to this site very often but i desperately need you guys help.

im trying to get a gamebridge i purchased a few days ago to work. the first day i had everything going according to plan and had it installed on there and everything, but then i was having problems with it... it wouldnt show my game screen. so i decided to install to a new usb drive.

i took the device out and tried to reinstall to another drive but it didnt work... and now when i try to put it back into the original drive it gave me an error. so i went into device manager and unistall the device manually from the original drive.

but now i try to install it again to any drive it give me the code 28 error...
someone please help me i really need to fix this problem.

thanks in advance!!!!!!!!!!!!!!!!!!

Answer:USB drive not properly installing device(GAMEBRIDGE). (unknown device code 28)

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Hi Team, Recently I have Updated my Laptop from Windows 8 to Windows 8.1 single language pack. Once Installation is completed, I faced problem in starting Dolby Audio driver, I have installed the latest driver and it got resolved. Next came the problem in Bluetooth device in accepting files from my mobile, then done the same. Installed latest driver and it too got resolved. But still i am facing the message "Unknown device" in Lenovo Support Center in Device Manager. I have checked in Device Manager. But no device is indicated in yellow color. Please let me know, how to identify which device is causing this problem and how to rectify this. My Laptop details:Model : G580Product ID : 20150 Let me know if you want more details. Thanks,Sathish Kumar

Answer:G580 Lenovo Support Center - Device Manager - Unknown device

hi there,can you please submit the device id?
right click the unknow device > properties > details

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I can no longer use the mic that came with my Xbox 360 wired controller on my Windows 10 PC after I upgraded to the Creators Update a few days ago. In the Device Manager it is listed as 'Unknown device' and if I try to 'Upgrade Drivers' then I get this error message: "XBOX 360 Headset Device. An error occurred during the installation of the device. The driver installation file for this device is missing a necessary entry. Contact your hardware vendor". Anyone have any idea how I can get it working again? I can't find the driver for this thing anywhere! I used it for Cortana searches as well as communication in Overwatch.

Answer:Creators Update Broke My XBOX 360 Headset Device (Unknown Device)

- have you checked here:
Xbox 360 Wired Headset troubleshooting for Windows 10

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Only bought Yoga 2 Pro for few days and start to have bluetooth issue where intermitten disconnection with my logitech M557 bluetooth mouse and now is totally failed with Unknown USB Device. Tried download and re-install new bluetooth driver from Lenovo Support Site but still shown as Unknown USB Device. Pls help!

Answer:Yoga 2 Pro Bluetooth - Unknown USB Device (Device Descriptor Request Failed)

Same issue,  been a problem since I purchased last Christmas.  Sometimes I want to throw this piece of crap out and buy a mac.  Lenovo, get your head out of your ass.

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I was just working happily when my Microsoft Bluetooth Mouse just suddenly stopped working.
The Bluetooth settings page says "Bluetooth is turned off" and there are no options on the settings page or the system tray to turn Bluetooth on.
The Device Manager now has "Unknown USB device - device descriptor request failed" where it did not before.
Other devices all seem to be working fine - USB devices plugged in are being recognized and work properly. Only BT seems to be broken.
I've tried:
uninstalling the device and rebooting
installing the latest updated chipset drivers from the dell website
windows updates
pretty much all of the advice here: http ://

Any other ideas?

Answer:XPS 15 9550 Bluetooth stopped working (Unknown USB device - device descriptor request failed)

So in desperation I just went into BIOS settings to see if there are any BT settings that may have become disabled. I didn't see any, and I didn't change any other settings.
After rebooting, BT and my mouse is now working again.
Something seems to be really flaky here, but hopefully this will help others with the same issue.

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I have just reinstalled windows 7 on my lappy HP 2000-2d13CA but having issues with the following device drivers:ethernet controllerPCI devicePCI simple communication controllerSM Bus controller Please assist with the way forward

View Solution.

Answer:other device drivers-ethernet controller/PCI device/PCI simp...

Hi: Install the smbus controller driver first and restart the PC. This package contains the Intel Chipset Installation Utility and Driver for supported notebook models and operating systems. This utility enables the operating system to show the correct name for the installed Intel hardware in the Microsoft Windows Device Manager. File name: sp56670.exe ethernet controller: This package provides the Realtek Local Area Network (LAN) Driver that enables the Realtek Network Interface Card (NIC) Chip in supported notebook models that are running a supported operating system. File name: sp56680.exe PCI device: This package contains the driver that enables the Realtek Card Reader in supported notebook models that are running a supported operating system. The card reader enables users to read from or write to supported removable storage cards, which are typically used in digital cameras, digital music players, and cellular phones. File name: sp64801.exe PCI simple communication controller: This package provides the Intel Management Engine Interface (MEI) Driver for the supported notebook models and operating systems. The Intel Management Engine Interface enables communication between the host operating system and the Intel Management Engine firmware. File name: sp56675.exe

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Please help me with this!! I recently reinstalled windows XP sp2 and my Wireless Network Adaptor is not detected on Device Manager. I tried few drivers online but didn't work. i am unable to connect to internet through wirelessAlso I got yellow "?"under Device Manager-Other Device-Network controller ----My Thinkpad is R51 2888NQ2. 

Answer:I got yellow "?"under Device Manager-Other Device-Network controller
download this driver, once it is unpacked, install the driver from c:/ under driver folder. 

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Hello! Does anyone knows where to find the LENOVO ENERGY MANAGEMENT SOFTWARE for the yoga 3 pro? I could not find it on the yoga 3 pro support page... I am using the one from the yoga 2 pro, but, I am having some BSODs ,which I do not know if they are caused by the wrong driver used... Thanks!


Go to Solution.

Answer:ACPI\PC2004 unknown device in device manager - YOGA 3 PRO

Hi dalmaso, and welcome to the Lenovo User Community!
Can you explain more about what you are trying to achieve with your Yoga 3 Pro? Why are you trying to run Yoga 2 Pro software?
You can find all the Yoga 3 Pro drivers either on the Lenovo D: partition of the SSD, or on the Lenovo support site.
There is no "Lenovo Energy Management Software" for the Yoga 3 Pro. One Key Optimizer manages advanced Yoga 3 Pro power options.
Hope this helps!

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How do i figure out what driver or even component windows wants software for when in the device manager under other devices it lists an unknown device and windows update cannot find anything.

Oh and is it appropriate for me to use this topic to ask another question regarding explorer.exe as while i am inside a folder i delete (by choosing delete from the context menu in the tree view) while inside that folder on this particular laptop PC explorer. always crashes, collect information, sends it and restarts explorer. I have not experienced this problem on any other pc running any version of windows 7, oh and the same happened with build 7264 x32 and the current install of build 7600 x64.

Answer:Device Manager reports Unknown Device & explorer crash

Please fill up the System specs...

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dear toshiba ,
i have unknown device in device manger for satellite C50D-B1107,part number PSCN5V-00700HAR
although i download the needed divers from toshiba website ,then i follow steps in technical knowledgebase (how to identify an unknown device)
the driver have ven_1022 and dev_7814 ,searching for the needed driver I found noting and I wounder why this driver not includred in motherboard driver package
so I nee your support to get this driver
waiting your feedback soon
kareem maaty

Answer:Satellite C50D-B1107 - unknown device in device manager

note os: win 7 32bit

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Hi everybody.

I just bought myself a Powercolor Radeon HD 4890 yesterday. After installing the card and the required drivers everything works like a charm. However, every time I start up my PC I get a message saying that a new device has been found on my system. On checking Device Manager I found an "Unknown device" entry under "Other devices".

I'm attaching a screenshot of Device Manager.

Are there any drivers I'm missing? It only happened after removing my old card (after uninstalling all its drivers) and installing the Radeon.

Any help is greatly appreciated.


Answer:Unknown Device In Device Manager After Installing Radeon HD 4890

I have a Powercolor Radeon HD 4890 (I also have a Gigabyte 4890 and XFX 4890 in two other PCs). I think you need to install the latest ATI Catalyst Suite. You may have installed the driver only package. Anyway, I think it has to do with the HDMI capabilities of the card. High def sound is built into the card (the HD part of the card name) and the HD sound driver is part of the Catalyst Suite. When you use an HDMI cable to an appropriate display, HD sound is also transmitted through the same cable from the Radeon graphics card.

Of course, be sure to install .NET Framework 2.0 as it is required before you can install the full Catalyst Suite. The HD sound driver won't install without it. At least I had trouble before I installed .NET 3.5. I went to Windows Update and installed .NET Framework 3.5. 2.0 is included in that update and 2.0 wasn't available separately.

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Dear All,

I bought a Satellite L30-PS33 with Vista but due to driver issues with my existing peripherical equipments, I decides to change from Vista to XP.
I have a problem with internal HUB usb, even if the installation is OK with windows XP generic drivers when I plug an USB devise, I have the message: Unknow device.

Can you give a link to find the good drivers I have to use in my computer?
It's very difficult to use a computer without any USB equipment?

Thank you and I hope you have any solution for me.

Best regards.


Answer:Satellite L30-SL33 : Unknown device after pluging external device to USB

There are no USB drivers for any Windows operating system.
Fact is that USB driver are a part of the Windows system and you will not find any 3rd party drivers for a USB port.

In your case I would recommend updating the BIOS and to update the Win XP to the latest state. All XP patches and updates should be installed!!!

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Hi everyone,

I have a Satellite L500D and in device manager listed under Other Device I have Unknown Device Listed. I have installed all drives listed on the Toshiba page without any success, has anyone had this before and if so could you please tell me how to fix it.

Answer:Satellite L500D - Unknown Device listed in device manager

Can you please tell us which OS do you use?

Anyway, how to identify unknown device in device manager you can read here

Please check it out and send some feedback.

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I have a unknown device in device manager. When I plug in my power cord to charge i get a black screen as soon as i unplug the windows screen comes back. Not sure if these are related or not.


View Solution.

Answer:Unknown Device - Device Instance Path (ACPI\INT33BD\1)

Hi: I am pretty sure you need this driver.  The latest is for W8.1. This package provides the driver that enables the Intel SidebandFabric device. Intel Sideband Fabric Device Driver is a bridge tothe Intel Dynamic Platform and Thermal Framework. This package isprovided for supported notebook models that are running a supported operating system. File name: sp65474.exe I don't know if not having that driver installed is related to the black screen issue.   

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Fix for - HD Audio devices won't start or you can't load correct driver. Lenovo H320 - Win 7 64-bit I-3 processor. 5 series/3400 chipsetHere is a working procedure to fix the problem when you install windows 7 64-bit and can't get the correct drivers installed for the HD Audio devices 1)Realtek AC97 HD Audio device id = HDAUDIO\FUNC_01&VEN_10EC&DEV_0662&SUBSYS_17AA3604&REV_1001and 2)Intel HD Audio device id = HDAUDIO\FUNC_01&VEN_8086&DEV_2804&SUBSYS_80860101&REV_1000 Regards >>> Sucromatic ?For an IBM LENOVO 320 with Windows 7 64-bit Home Premium Version download these drivers to a directory in a second partition to prevent this nightmare from happenning in the future.1)AC 97 high def audio versionRealtek HDA 2.67found on or at www.realtek.comon right of screen on homepage and2) Intel HD GRAPHIC and HD Audio versionIntel GMA (Vista/7) (XP)found on your OS and and whether 32 or 64 bit. I recommend the .exe version as it works very smoothly. Uninstall HD AUDIO DEVICE or whatever it is called maybe "unknown device" with ac97 device ID "HDAUDIO\FUNC_01&VEN_10EC&DEV_0662&SUBSYS_17AA3604&REV_1001." Afterwards install AC 97 HD Audio Driver. After install reboot and wait till computer completely starts.Now uninstall Intel HD Graphics or your graphics device. When you get the uninstall box open, select delete ... Read more

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I have unknown device in device manager

It says unknown device on on Microsoft ACPI-Compliant System

(oh and i also didn't install modem drivers since i don't need the modem anyway)

Answer:Satellie A300-1EC PSAG0E: unknown device in device manager

What OS have you installed?
Windows XP?

If yes, check if your Windows XP is up to date (install MS patches and hotfixes)
Also install all available drivers from the Toshiba driver page like:
Chip Set Utility, Storage Manager, etc? and if there is an newer BIOS version, then update it.

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My 7270 latitude touch screen stopped working shortly after first use (after win update worked again but for a short time).
All drivers are up to date.
In device manager a USB device shows as unknown (yellow warning triangle), otherwise there are no indications to the source of the problem.  There is no other touch screen device showing in device manager. 
How do I perminently solve this?

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I've managed to identify all other devices except this one. It appears in Device Manager as:

Location: on Intel(R) QM57 Express Chipset LPC Interface Controller - 3B07
Device Instance ID: ACPI\IFX0102\4&375529C7&0

Any suggestions?



Answer:Portege R700 (PT311E) - Unknown device in device manager on XP


In my opinion this device has something to do with chipset and therefore you have to install the Intel chipset driver. You can download all drivers on official Toshiba website:

Check also the exact vendor and device ID in device manager to identify this device. The PCI database website can help you to do this:

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I recently put together a new computer, and in the process of of installing the USB 3.0 connector from the front of my GX500 case, I either bent numerous pins on the motherboard USB 3.0 header or the motherboard shipped that way and I inadvertently made matters worse. Anyway, that header on the motherboard is without a doubt unusable.
Since I don't really need the USB 3.0 functionality, I bought a USB 3.0 -> 2.0 adapter cable, connected one end to the connector on the front of the case and the other end into the USB 2.0/1.1 header on the motherboard. Unfortunately, when Windows 7 boots and I plug a device into the front ports of the case, Windows detects the front USB ports as "Unknown Device" within Device Manager yet says the driver is successfully installed. I've already downloaded the most current Intel chipset drivers for my motherboard, deleted and reinstalled all USB drivers, and all rear USB connections are working perfectly fine - it's just the two front ports that are connected from the case to the USB 2.0/1.1 ports via the adapter cable.  I've tried both USB 2.0/1.1 headers on the motherboard, and I've tried plugging in several devices to the front USB ports, and this problem still persists.
I've ensured the connection inside the case is solid, yet I cannot get Windows to recognize the front USB ports.  However, I have confirmed that power is being sent to the front ports because it charges my phone when I connect it to the front USB ports via m... Read more

Answer:Front USB Ports not Working - "Unknown Device" in Device Manager

If your motherboard has a 1x pcie slot you can get a card like this...
Some motherboards it's a tight fit because of the video card taking up space. In that case you can relocate the above card with this...

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I need assistance finding the drivers for my elitebook 8570w.  Hardware ids are attached.  Please help thanks

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Hello there!

I would be very grateful for any help/hints if somebody has an idea what to do....

My gf has the above mentioned laptop (w/o preinstalled OS) and we can not get the display adapter to work properly - situation is as follows

1) mobile intel 4 series express chipset family and an unknown device with a question mark in device manager
2) both are on the same PCI BUS 0, device 2?
3) intel is not working because it has no free resources (should I delete the unknown device?) to work with
4) HW ID for the unknown device is pci ven_8086&dev_2A43 and for intel is pci ven_8086&dev_2A42 (so basically the same, right?)
5) last, but not least, if I go to Desktop-personalize-advanced (first of all no 1280*800 resolution) i see under adapter type: . Exactly, nothing... under properties, this appears: non plug and play device, Super VGA and under driver, I see just the status and option to Stop, Disable, Automatic, Demand.... the device on startup... .If i disable it, the display just does not light up when the laptop is turned on....
Any ideas? I am going insaneeeeee......

Vista Home Premium, all other Toshiba SW installed (value pack, intel, BIOS 1.9, etc... - maybe BIOS did this?!)

Thanks in advance!!!

p.s. maybe SP1 that I am installing now will help?!

Answer:Satellite L300 PSLBGE - Unknown device in device manager


Wait a moment: I have checked Vendor ID and Device ID on and this device is the Intel graphic card. So I think this is the reason why you can?t change the screen resolution.

I assume that you have forgotten to install the display driver. Check the Toshiba website because there you can download the driver: => Support & Downloads => Download Drivers

After this you shouldn?t have any exclamation marks anymore.

You can install SP1 for Vista but this will not solve the problem with the missing display driver. But you should install it because it contains a lot of security updates they are important. Furthermore I would recommend to install SP2 for Vista.


1 more replies
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Hi everybody,

I've got a A100-926, in device management it show me that there's an unknown pci device at bus 7; function 3, but there's no way to know what is it and how I can install it because if I push reinstall driver it can't find the right one onto the toshiba tool cd.

I don't know if it's related to this but in some application the button delete must me pushed for more than a second to work :-(
Is there anyone that can help me?


Answer:Satellite A100-926: unknown device bus pci7; device:6; function: 3

Did you reinstall the operating system on your notebook?

Usually the notebook is delivered the Toshiba image and there should be unknown devices in the device manager?

In the forum some guys have placed the link to the very useful Toshiba document.
It described how to identify the unknown devices.

Maybe it will help you to find out what device it is.
Then you can download the right driver from the Toshiba page?

3 more replies
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Sorry that last word didn't get in the subject line.


These two values are:
My bios info
So should I do this:

ASUSTeK Computer Inc.-Forum- driver missing
When I download that zip file from under "Install the Bluetooth driver:" it has so many files to choose from.... I don't know what to do?

I've also found out that I need to disable "boot from network" or "boot from lan" in bios to get rid of this unkown device issue?

Answer:Unknown device in device manager after Bios default settings are

Well it might be a good idea to look at the following tutorial:

Device Manager - Finding Unknown Devices

Use the link in Step 7

Also I tend to find this tool useful:

Download - Hardware Identify Portable - MajorGeeks

Right click on each result in the list for more options.

Edit: On my machine a similarly named device appears to be a webcam.

In the list USB Composite Device doesn't mean much but matching the ID seems to indicate that it's the webcam.

4 more replies
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I have a Toshiba laptop, model L505-ES5018. I had Windows 7 Home Premium 64 bit installed on here, but decided to reformat my hard drive using Windows 7 Ultimate 64 bit. After the reformat was finished, I ran Windows Update and it found several items to download and install for me. I noticed that it also found optional items to download and install for me, so after all the important updates installed, I ran the optional updates. After all of this installed, I checked Device Manager to see if there were any errors and I found nothing. I assumed everything was fine. I decided to check Devices and Printers and under my laptop icon, there was a yellow icon with an exclamation point on it. I decided to run the troubleshooting option when I right-clicked the gave me a solution to download a Toshiba password utility program, so I did that and nothing happened, even after restart. Same icon appeared. When I clicked on the icon a second time, I noticed that the model of my computer at the bottom of this window, changed from L505 to TIAS. I have no idea what this is. I decided to do another reformat on my hard drive. This time, I ignored the optional updates. I checked Devices and Printers again, the same icon appeared but the model of my computer said L505, like it should. There is something in the optional updates that is changing this. Could it be the Intel chipset driver that the optional update is pushing? I'm not sure. I went back to Device Manager, th... Read more

Answer:Unknown Device in Device Manager/Show Hidden Devices

Hi there ... You should Install the chipset Driver and also the Realtek Driver for your card Reader ... From the Toshiba website ... The Link is provided below

Satellite L505-ES5018 – Windows 7 32 and 64-bit Drivers Download

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I have recently reinstalled windows xp on my laptop and since the reinstall found new hardware wizard keeps popping up saying it has found PCI device, but I cannot find the drivers for it neither will the laptop find the drivers automaticaly.

Any help much apprechiated


Answer:Equium A110-233 (PSAB2E) - Unknown PCI device in device manager


Hav you already checked the vendor and device ID in device manager? Check this please and on this website you can enter these ID?s and then you can see what device it is.

Furthermore the drivers can be downloaded from Toshiba directly: > Support & Downloads > Download Drivers

If you have more questions, please let us know! :)

6 more replies
Relevance 82%

Hello there,I performed clean Windows 7 installation on my Lenovo ThinkPad Edge E545 laptop, I installed all the drivers and Windows updates, however I still have one unknown device in Windows Device Manager that I can't get to work properly. I do not know what the device is and Windows troubleshoot doesn't help at all. I did some googling and checked your Lenovo support and found out that this might be missing Power Management driver but I have installed it and the issue persits. When I go to device's Details tab it lists two Hardware Ids: 1) ACPI\SMB0001, 2)*SMB0001 (screenshot provided).Unknown deviceI have also tried to install AMD SMBUS driver and many others (Synaptics driver) and in the end I got rid of all unkown devices from the Device Manager except this last one. Could you please advise on which driver I might have missed or what steps need to be taken to solve this issue? Thank you very much in advance,Michal


Go to Solution.

Answer:ThinkPad Edge E545: Unknown device in Device Manager

Okay, issue solved. It turned out to be my bad (as I expected) and I solved it by installing ThinkPad UltraNav Driver.

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Relevance 82%

Even with all the latest updates installed, I still get this annoying warning from Lenovo Solution Center 'Unknown device' - status 'not installed'  Control Panel / Device Manager gives no signals something is wrong. why?! Details:Computer: Thinkpad Yoga (TPY)OS: Windows 8.1 all updated Lenovo Solution Center version: 2.2002 / revision 17630 External device attached to TPY:  OneLink Pro  (also has latest driver = Realtek 8.10.1009.2013) Thanks in advanceOlof 

Answer:'Unknown device' in Lenovo Solution Center, but not in Device Manager

It seems to me you are missing some update from Lenovo. I had the same issue, however just recently after updating any available software/drivers for the TPY the message has disappeared.

2 more replies
Relevance 82%

I'm using the W540 with an ultradock and external monitors. After upgrading my W540 to win8.1 64 bit, device manager is showing an unknown device. I'm not quite sure what it is, but almost everything seems to be working fine and Lenovo solution center isn't finding any driver updates. I did notice that the solution center hardware scan did not test the video card memory and listed that test as N/A. Video and monitors seem to be working fine though and both nvidia and intel graphics show up in device manager. Device manager lists the device in question as follows:Device instance path: ROOT\SYSTEM\0001Hardware Ids: root\iwdbusDevice stack: \Driver\PnPManager 


Go to Solution.

Answer:Unknown device in device manager after win8.1 upgrade W540

This seems to fix the problem.. any idea why? (In device manager - Right click, uninstall, scan for hardware changes)

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I am not able to find the one of the Drivers. In Device Manager when I check details of the 'Unknown Device' it says 'TOS6205/ACPI compliant'.

I have tried searching for the 'Bluetooth stack' Driver for my model in the Driver Download pg. But i dont seem to fine one.

Details of my laptop:-
Model :C660-A275
Short Model :PSC1NV (got this from Part No)
OS : Windows 7 Ultimate version 6.1.7600 (build 7600) (i guess it is 32 bit). (laptop is x86)

Please suggest some solutions at the earliest.


Answer:Satellite C660 - unknown device tos6205 in Device Manager

goto drivers page

enter everything except PSC1NV

take & set up
Bluetooth Filter Driver Package
Bluetooth Stack

that's all

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Relevance 82%

Since a day or two I get this error in my Lenovo Solution center.I've tried to update the driver, but that failed.The G710 is running W8.1 Any solution available?best regards Piet.

Answer:G710 Unknown USB-device (Device Descriptor Request Failed)

Hi Piet_Bos,
Welcome to the Forums    
As per the query we understood that you are facing issue  with error in USB device in your Lenovo G710 laptop.

Unplug all USB peripherals connected on the machine
Run Windows Update to get the latest patch and bug fixes (reboot if necessary) and try the USB devices.

If still the issue persists then please follow the below steps:-

Go to start button right click on my computer.
Select properties in left upper corner you have 4 options select ?advance system settings? option.

3.System properties pop up comes under that select hardware option and select device installation settings and disable the auto driver download option and select save changes and restart the system.

Now try to update the driver and check for the issue.

Hope this helps. Do post back if the issue persists!                                                   
Best regards,                                              ... Read more

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It WinXP Pro + SP 3.
In Device Manager display, as an unknown device. Try all drivers, who were on a disk along with the laptop, nothing helps. Give the solution!

Answer:Re: Satellite 5200-701: Unknown device in the device manager.


who should give you THE SOLUTION? I mean, you tried all drivers and nothing did installed... So, does your machine run properly? Does some device not work like it should?

Please check this firstly before installing all drivers without any success. Try to guess which device it could be, so then we can search for some solution.
A good beginning would be to check the device in the device manager and write some of the information which is contained in the Properties window of the device.
Please post the details which are in the properties of the device, maybe someone here in the forum can find out which device won?t work.

I assume also that the SP3 makes some problems, so another good option would be to deinstall the SP3 and go back to SP2.


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Relevance 81.59%

Turned on phone and said to plug into computer with USB and open Hisuite.  Is it an app that i can download and also how do i get the computer to recognize the phone?

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Relevance 81.59%

Can any help with this problem? Have a Pavilion G6 with no USB 3.0 as I am aware. USB (3 ports) not working.However, when the plugged the mobile, the mobile does get charged. Device Manager shows "Unknown USB Device (Device Descriptor Request Failed)".   Running Windows 10 64 bit. Tried everything like uninstalling, updating etc as the information on the internet. Also, updated the drivers using Driver Easy but still getting the error. Any suggests, please? Thanks in advance. Sanil Sukumaran.

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