keyboard not responding on an HP Desktop. This belongs to a friend and i have no idea what kind it is. The mouse will work the keys will not. She used a regular and a USB keyboard and neither works. She has had it 7 years and it was working and now it's not. What is the problem with it? How can it be fixed? I tried to tell her to press F11 to do the restore but no keys are working but the shift and she said that made the mouse stop working. Please help.