Hi!
Do a search for
wdma_usbinf.bak and
wdma_usbpnf.bak on your PC (include hidden and system files). When (if) you find them, back them up (make a copy somewhere and note the location so you can restore them if necessary, they should be under "
...\windows\inf", if at all) and then rename them to
wdma_usb.inf and
wdma_usb.PNF.
That should do it (you might need to restart).