To repair this error:
1)Run regedit Click on Edit -> Find kbdclass
2) Search through for as many “Upperfilters” you can find.
Mine was under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318}
3) They most likely have 2 lots of drivers associated with it eg ‘tphclhs kbdclass’ , usually comes if you have installed VMWARE previously
4) Double click the ‘Upperfilter’ and delete the other entry except ‘kbdclass’
5) Search for all instances of this and change them
6) Go to device manager and uninstall your keyboard – then ’scan for hardware changes’
7) You will most likely need to restart Keyboard should now be working fine.
