Device driver not installed for unknown device.

Question

After upgrading my various computers to Windows 7 Home Premium, I am now getting the small yellow triangle icon on the computer icon in the devices and printer screen.

After running the troubleshooter from the context menu the result indicates there is no device driver for an unknown device. Also in device manager under other devices there is an unknown device with no driver.

How can I resolve this issue when I don't know what the device is?

Answer 1

Hi table100,

What’s the make and model number of the computer?

Have you tried right-clicking the Unknown Device and **** selecting Update Driver Software?

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What happens when you try the above steps?

Since the device gets detected as Unknown, let’s check for the status of the same.

1. Right-click the Unknown Device in Device Manager and select Properties.
2. Under General tab, check for the status of the Unknown Device under Device status.

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Does it show any error message/code associated with the Unknown Device? If yes, let us know the exact error message.

Let’s also check for the Hardware Ids and see if that throws some light on the Unknown Device.

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Right-click the Unknown Device in Device Manager and select Properties. Click the Details tab.

Under Property, select Hardware Ids from the****drop-down menu.

What are the values that appear in the Value box?

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Let us know the details and we shall proceed with the troubleshooting accordingly.

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Gokul - Microsoft Support

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Answer 2

Hi table100,

The recommended resolution for Code 28 is to update the driver, which you have already done with no results.

Also, since the Hardware Id is not displayed in the Device Manager, let’s uninstall the unknown device from Devices Manager, restart the computer and check if that fixes the issue.

1. Click Start, type Device Manager and hit Enter.
2. Locate the Unknown Device.
3. Right-click the Unknown Device and **** select Uninstall.

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Follow the on-screen instructions. Restart the computer and check what happens.

Hope this helps!

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Gokul - Microsoft Support

[If this post was helpful, please click the "Vote as Helpful" (green triangle) button. If it helps in resolving your issue, click "Propose As Answer" or "Mark as Answer" button. By proposing/marking a post as Answered, or Helpful you help others find the answer faster.]

Answer 3

The values that appear are ACP\VEN_SNY&DEV_5001

Answer 4

DOT4\VID_03FO&PID_3CO2&REV_0100&PRINT

DOT\VID_03FO&PID_3CO2&PRINT

DOT4\PRINT

Answer 5

Good morning, here are the details

Right clicking the device and selecting update driver software results in a  - windows could not find driver software message.

Device status shows - the drivers for this device are not installed (Code 28)

Hardware Ids - not listed on the drop-down menu

Physical Device Object name \Device\00000007

Thank you.