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Windows 7: Device Manager - Finding Unknown Devices

04 Jan 2011   #10

Windows 7 Home Premium x64

Just subscribing to this thread. And thanks, it is very helpful.

My System SpecsSystem Spec
23 Mar 2012   #11

windows 7 home premium 64 bit

Usually, when you buy any hardware the drivers come along with it on a disc. If you lose the driver disc you can always download the necessary drivers from the manufacturer's website. But what do you do when you are not sure of the manufacturer of the hardware?

Every device has a Vendor and Device id associated with it. If you can find this ID, you can find the manufacturer. In Windows it's easy to find the vendor and device id.

Hardware Identification
  1. Open Device Manager (Control Panel>System>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it's easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this

  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:

    Vendor ID = 8086
    Device ID = 27DC
  7. Once you have obtained both the IDs, proceed to PCI Database. There you can either search for the vendor from the vendor ID or directly get information about the device along with the vendor name by searching with the device ID.
Great isn't it? Now you will never have to go hunting for correct drivers.
My System SpecsSystem Spec
30 Nov 2015   #12

windows 7 ultimate 32 bit

I have tried to find the solution to my unknown device drivers from your post. But i was not successful till now. It has no hardware id, the device that has exclamatory mark is my computer name , which is shown as an icon in hardware and printers in control panel .
I have tried your second part, where some details are given.
I enclose the details and would like you to find my unknown device
I have speccy as a system information tool but that is software . What should i do if i have. expecting your reply..pci z tool does not show the unknown device in its show list.
and one more information is
device info path is ROOT\LEGACY_MFESAPSN\0000

Attached Files
File Type: txt unknown device.txt (2.4 KB, 287 views)
My System SpecsSystem Spec
05 Dec 2015   #13

windows 7 ultimate 32 bit

Hi, Why no reply to my query?
My System SpecsSystem Spec

06 Dec 2015   #14

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring

Its a MCAfee driver, try running thier own uninstaller to remove it.

My System SpecsSystem Spec
06 Dec 2015   #15

windows 7 ultimate 32 bit

Hi, I tried their installer. successfully done. But unknown device problem still exist
I mean i still have their mcafee problematic driver in the problem device in the msinfo32.exe. How to get rid of it
My System SpecsSystem Spec
07 Dec 2015   #16

windows 7 ultimate 32 bit

Hi, Is there any other way of knowing what that unknown device. I have unplugged all the usb printer scanner etc etc. But still has this error. Would it be controller drivers
My System SpecsSystem Spec
07 Dec 2015   #17

windows 7 ultimate 32 bit

Hi, I resolved the problem and thank you for guiding me that it is mcafee product residue.
I also knew that after surfing, and tried to uninstall. But it would again appear in the next boot and show as unknown device.
Then i tried to troubleshoot the unknown device main tab,in safe mode by right clicking it. It then triied to install two drivers, one for the i/o controllers and another for unkown device. It succeeded in the first and but failed in the second.
Then i boot in normally and found that no unknown device was shown in device manager, device and printers.
Then i checked the msinfo32 tool in the run command and checked the problematic device in the "components" tab. There is no problematic device shown.
I also wish the article owner to incorporate this in his article as an additional help.
The device info path: is where to look for the culprit device .
How software device could be shown as hardware device, is still a mystery. Will any one guide me on this?
My System SpecsSystem Spec

 Device Manager - Finding Unknown Devices

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