so about a week ago my cpu fan stopped working and now everytime i turn on my computer it stays on for about 5 mintues then it shuts off. now logically thinking i would think that this would be because the computer has a saftey feature that would make it shut down after it reached a certain temp. but i dont know... now that is basically my question to you, do computers shut down after reaching a certain temp ot not? and if not what do you think my problem may be? new cpu or motherboard? or will it be as simple as buying a new heatsink and being on my way? thanks in advance for any insight you can give me on this matter. i would like to have my computer running again as soon as possible.