We recently bought a computer with a GA-M55S-S3 motherboard. It has a AMD Athlon 64 X2 5000+ processor, a Xpertvision 7600gs, and a 500watt power supply. We have taken it back to the manufacturer countless times with many problems. The main problem we have with it is that on random occasions it turns off. Today when i turned it on it said it was missing the file c:\windows\system32\config Anybody have any idea what the problem could be? Is the power supply powerful enough for a computer with this processor and graphics card?