My computer was making incredibly loud noises. I have 2 desktops and a laptop. Both the laptop and one of the older desktops I used for typing/printing only started making noises. Since the laptop is new I fixed it immediately (bought the warranty and everything). Now the older PC, I tried fixing it myself. I cleaned the fan. And it actually started working again. But now, a week after the cleaning the fan doesn't work at all. The computer has been on for 3 days and it's still working. Just out of curiosity, how long can a computer last before it dies without a CPU fan? I'm going to buy one today though. Is it enough if I just tell them the stuff that's written on the CPU fan (CPU COOLER - DC 12V / 0.09 A - PL 50S12M) or do I have to measure it? It's around 2.5" long I think. Maybe even less. I'd appreciate any help. update: OK for no reason whatsoever my fan seemed to have started spinning now. The only difference I noticed is the room temperature. When it wasn't spinning the room was very cold (open window all night). Now it's warmer by at least 7C and it started working for no reason. Does the room temp have anything to do with it?