Hey, Just recently my old Vista Computer that I've had for about 4 or 5 years started to make a real racket when using it, at the time we didn't know, from it's motherboard fan. Well, one day I clicked it on, it loaded up and after about 8 or 9 minutes of running the computer shut itself off. *It did not restart itself, it just simply shut off. I tried it again, and it did the same thing. We popped open the side, and found the motherboards fan's lock had broken and the fan was no longer secure to the motherboard. I wanted to know if this is the reason it was shutting itself down, or if there is something else going on? any help would be great, thanks.