A few days ago my PC froze and I had to press the reset button. Now it refuses to start at all.It gets to the DOS page and will not get passed the line which states checking NV RAM. The screen freezes and wont allow me to startup in safe mode.I thought it may have been the mother board battery but this is not the case. Motherboard = SLKT400 Process = ALFON 2000XP O/System = XP 200 Process = 512 mega RAM. This is driving me nuts, so any feed back is a sanity saver.