FAQs [Document Camera] Error: "The driver installation class is invalid or does not exist."

Device Manager shows an "Unknown Device" with an error: "The driver installation class is invalid or does not exist."

Q: Why does Device Manager show an "Unknown Device" with an error saying the driver installation class is invalid or does not exist?

A:

To resolve this issue, follow these steps based on the device guide:

1. On a working computer, open the registry editor and navigate to the following path:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class

2. Export this registry entry, then import it into the registry of the computer with the issue.

3. Return to Device Manager, right-click on the unknown device, and select "Update driver software."

4. Choose "Search automatically for updated driver software."

This should complete the driver update, allowing the device to function and display correctly in Device Manager.

If your computer has an "Unknown Device" error about an invalid or missing driver installation class, you can follow the steps above to resolve the issue.