If bonk's fix doesn't work you may need to delete the UpperFilters and LowerFilters in the registry.
Back up your registry first.
Click Start> Run.
Type: regedit and hit OK.
Click the plus sign (+) next to HKEY_LOCAL_MACHINE
Then go to System/CurrentControlSet/Control/Class/
Click on {4D36E965-E325-11CE-BFC1-08002BE10318}
On the right hand side of the window, click UpperFilters.
Right click and select delete.
On the right hand side of the window, click LowerFilters
Right click and select delete.
Close the Registry then
Restart the computer.