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my computer keeps restarting within 2 seconds, I don't have the time to acess the BIOS or anything. I have to turn off with the switch, and I have to wait like 2 min before trying to restart it if not, it simply won't start.

The 1st restart goes up to the windows logo, but then the computer crashes and keeps crashing after every 2 seconds.

Do you have an idea of what could be the problem? PSU is brand new coolmaster 700W. It's not a super powerfull gaming computer. It's a basic gaming computer.

I'll inspect the parts later this week.

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Do the cooling fans turn? is it full of dust? – RedGrittyBrick Aug 24 '12 at 15:18
Sounds like a temperature problem. Switch the computer on, go into your BIOS temperature monitoring tab (if present) and wait. Does it still crash when in the BIOS screen? Can you see what the temperature of the CPU is when it crashes? – terdon Aug 24 '12 at 15:19
Thanks, Ill try that when It starts up again. – Napster Aug 24 '12 at 15:24
Just a guess, but I think it's broken. Maybe you need to take it to someone who knows how to fix broken computers. – Daniel R Hicks Sep 1 '12 at 2:34
I don't want to pay for food, or rent, but sometimes you gotta pay to play. – Ƭᴇcʜιᴇ007 Sep 1 '12 at 2:55

I've had a problem like this where the CPU fan had stopped. The restart in my case was the safety restart to prevent the CPU from taking damage due to the temperature.

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Your computer is definitely overheating. If it is a tower, it will be much easier to fix. The same principles apply for a notebook, but it is harder to get to everything, and usually require removing the motherboard. Obviously power down the computer before attempting anything below.

If you open the side of the tower you will see a 80mm fan on your motherboard. There should be a (usually silver) block of metal underneath it. This is your CPU fan and heatsink. All of the hold downs are different depending on what socket you have, but not matter what, you need to remove them both. You can remove them as one unit.

Underneath that is your CPU. You do not need to remove it, but you do need to clean the "goop" off of it with a lint-free cloth and some rubbing alcohol. That "goop" is called thermal paste, and is available at any local computer store or usually RadioShack. That will need to be reapplied. You just want to squeeze a pea-sized amount on top of the middle of your CPU before you put your heatsink and fan back on.

While you have your heatsink and fan removed, take it outside and blow it out with an air compressor or canned air. Remove as much dust as you can. Make sure your fan spins freely. If it doesn't, it will need to be replaced. Again - a local computer repair store or RadioShack. Usually it is only a couple of plastic tabs or four screws that hold the fan to the heatsink.

Once you have done all that, put the heatsink and fan back on the CPU, tighten down the hold downs, plug the fan back in, and you should be set to go!

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I think the first answer is on the money but, if a check of the the cpu fan shows it is working, then I would remove it and check the thermal paste. Sometimes this paste will dry out and leave the CPU thermally disconnected from the heat sink, basically trapping the heat on the CPU.

If you have a power source independent of the computer, I would check the fan operation with that. If the fan runs like it should, then I would clean the old paste off of the CPU, apply the new paste and reassemble. If the fan stops running, then I would replace the fan and thermal paste, CPU fans do go bad sometimes.

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