I agree, and this is easy & quick to do.
Something not so easy, but frobru you should take a look at this: USB Driver - General Fix for Problems
The premise is that you may have some hidden junk in your Windows system that this procedure will remove, i.e. that might be causing confusion or conflict.
You should make sure your kb and mouse are plugged-in and working, MAKE A SYSTEM RESTORE POINT ALSO, and then "view hidden devices" in Device Mgr to look for any/all "greyed-out" USB devices, and Uninstall them (either click-on and then select the Uninstall icon above, or right-click and select Uninstall).
You have to do these one-by-one. When finished reboot the PC.
Stick with the grey USB devices at this time, but if after you're all done you still have the problem, I would be inclined to open the other categories and uninstall the other "greyed-out" nonpresent devices as well.