I have Windows Vista home basic and the other night I was using it and suddenly it shut down and restarted...it seems to load just fine but once my desktop begins to load it sends me to the "shutting down" screen and restarts it yet again! I can run it in safe mode just fine. Also doing an OS repair on the Vista DVD just tells me that nothing is wrong with my computer. I ran Ad-aware and Avira in safe mode and it still doesn't do anything. Any thoughts?