Client has new Lenovo that after trying to install Avast keyboard quit. I pulled the w/l keyboard and plugged in a wired KB. Kept crashing the PC. I found and deleted a keyboard driver filter from Avast and the keyboard still doesn't work.
I can't run SFC and can't delete MS keyboard filter driver. I didn't set this PC up so of course there is no restore point to fall back on.....
FYI mouse works fine, and I tried two different w/l and KB types. Deleted the keyboard and tried to scan hardware changes and the same drivers install and fail. Windows update was no help as well.