Drivers/Hardware :: Keyboards Disabled - Most Of The Apps Didn't Work

Upgraded (???) a Windows 8 machine (HP with MS ergonomic keyboard) to Windows 10 a couple of months ago. It seemed to work, but most of the apps didn't work, and I couldn't access files as Administrator. this week I upgraded (???) a Lovono using Windows 7 to Windows 10. They are networked with printers and other computers via ethernet. Thursday afternoon the HP stopped recognizing key strokes. It allows password input on restart, but will not type anything else. It clicks like the buffer is full. Yesterday the Lovono started doing the same thing. My first thought was virus, although McAfee runs constantly on both machines. Used Malwarebytes on both and found a few PUPs, but no malware or virus. One forum suggested using DriverWizz, but it didn't change the keyboard driver. The Windows 7 computer on the same network, sharing files with both, is unaffected as yet. I'm thinking the solution will be to junk Windows 10 and go back to 7 and 8. If Windows 10 were a Vacuum Cleaner it would be terrific, but sucking like this is not all that terrific for an OpSys.