also check that you have USB Legacy support enabled in your bios, had that problem on my cars computer when it lost its cmos settings and reloaded defaults, unfortunatley defaults were NO LVDS interface (my screen connects on lvds), No PS2 Mouse (touchscreen is ps2 interface), No usb support (KB, GPS wireless lan are all USB) I was not amused when i had to strip the computer out of the car to reset it all (meant ripping out the entire dash)