How to Identify an Unknown Device in Device Manager

Windows Device Manager has a Yellow Exclamation mark on the device.

Windows has a missing or corrupt device driver.

Unknown Device in Device Manager

If Windows Device Manager is showing an "Unknown Device," after Windows Update has been done. The following steps can help identify the Device to install the correct driver.

1. Open Device Manager, press the Windows logo key, and the R key simultaneously. This should open a Run Box (Figure 1).
   
   Figure 1
2. Type devmgmt.msc and click OK or press Enter.
3. Device Manager opens (Figure 2).
   
   Figure 2
4. Right click on the "Unknown Device" and select Properties (Figure 3).
   
   Figure 3
5. Select the Details tab. In the drop-down box under property, select Hardware Ids (Figure 4).
   Note: The below screenshot is an example of information that can be displayed for an Unknown Device.
   
   Figure 4
6. The top line should list something like: PCI\VEN_8086&DEV_1916
7. The numbers in RED are the Vendor ID, and the numbers in Green is the Device ID.
   Example:
   Vendor ID = 8086
   Device ID = 1916
   Note: If the information in the top line is not similar to what is shown. You can search on Google for what is listed.
8. You can go to the following sites to search for the Vendor and Device.
   • PCILookup
   • Catalog.Update.Microsoft.com
9. Once you find the Vendor and Device.
   For example, 8086 and 1916 is the Intel Video driver.
   You can then download the driver from Dell.com/Support and resolve the "Unknown Device."

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