check invisible or nonpresent devices
Start | Run... | cmd $>set devmgr_show_nonpresent_devices=1 $>devmgmt.msc Device Manager | View | Show hidden devices
Devices what you was using did not appear in Window Device Manager. If set the variable devmgr_show_nonpresent_devices to 1 you can see them.
[...] fix that by removing overall nonpresent HID devices such as keyboards and mice November 11th, 2009 in general | tags: devices, event, [...]