Go into device manager and find the keyboard, right click on it and select "uninstall"  reboot the PC and windows will install the driver from it's driver cache, not the old corrupted one.

Hopefully this will cure it.

Thank you for your reply. This seems to have cured my problem for now, only time will tell.

Thank you again.

Your solution did not work, got the same old message last night.

Replace the keyboard with another model, if the problem goes away, then the Keyboard is defective.

 

Uninstall the keyboard in device manager again, before you shut down to replace it.