Computer about to crash (think its xp)

[Dr.Sarcasm]

Alright. I'm actually doing this for my friend, if that matters. He says his PC keeps abruptly turning off out of nowhere. Also, it won't restart unless he leaves it off for about 20 minutes, and it bluescreened him saying fatal system error. I told him probably the easiest solution would be to reinstall Windows XP, and go from there, but he wanted a second opinion. Anybody have any input?

 

[stueycaster]

Might be overheating. Check if the fans are working or if it's real dusty.

 

[Dr.Sarcasm]

It's not dusty, and the fans working perfectly fine.