Hello,
Just found something interesting in the past few days, people have been getting infected with some sort of virus or maybe human error.
What ever it is, it seems to be shutting people down that have geforce grapic card installed.
Take a look at this:
http://answers.yahoo.com/question/index?qid=20081030211857AABqVGQ
http://www.forumapex.com/video_cards/10165-virus_in_video_card_bios.html
Peace,
Vyacheslav ~