I have a e-machine laptop and the thing will just shut off without warning. It does sound like the fan is working hard, and they it will shut off. If you try to turn it back on right away, it will just shut off again. I do not know much about computer, and I don't know what is going on. Also, the computer does not turn off when I am running a certain program, it is random. Does is sound like I need a new fan, or could it be something else? I thank anyone that does help me.