first unsinstall Logitech programs
then
" Go into the registry editor (go to Start Menu, Run and type regedit)
2. Go to this location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318} and delete the two items "LowerFilters" and "UpperFilters"
3. Go to this location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro