Check in the device manager to see if they have a yellow exclamation mark against the universal serial bus controler ,if they do,check that the ports are physically intact ,then try running the motherboard driver disc to install all the drivers again.
then go to start\run type "cmd"
then type sfc/scannow,
have the o/s disc ready, as this will replace any system files that have got corrupted.
hope this will help you
good luck
Terry
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