Have a bigger problem that started with this problem. Need help! My laptop started displaying "USB Device Not Recognized. One of the USB devices attached to this computer has malfunctioned and Windows does not recognize it" whenever you plug any USB devive into either port. After reading several postings on different websites and trying many methods (uninstalling all USB in device manager, both in safe mode and regular mode, disconnecting all power and letting computer to discharge, removing memory and reinstalling,ect.) for several days I decided to call it a night and ran a virus scan. After completion of scan, computer froze. After waiting some time I decided to manually turn the system off. When trying to power up computer it will not boot or display. Fan comes on for a few seconds then goes off. DVD optical drive runs but after a short time stops. Been told it is probably motherboard. How do I find out without taking it to a shop and spending more than it is worth?