Computer keyboard fails and the keyboard is an exclamation point in Device Manager

cause Analysis: This problem may be caused by the installation of some software that we can resolve through registry modifications

Solutions

We can go to Registry Editor by clicking "Run" in the Start menu and entering "regedit" enter.

And then in the Registry Editor, we find hkey_local_machine\system\currentcontrolset\control\class\{. 4D36E96B-E325-11CE-BFC1-08002BE10318} then click on it to find the right

Remove the UpperFilters item, uninstall the device, and reboot.

Then the Device Manager becomes: Code 10: The device does not start

Navigate to hkey_local_machine\system\currentcontrolset\control\class\{4d36e96b-e325-11ce-bfc1-08002be10318}

Add string UpperFilters entry, content is Kbdclass, uninstall device, reboot