Desktop computer keeps shutting off by itself?

Question

Ok, so our Gateway desktop computer keeps shutting off by itself. Like it will stay on for a couple of minutes then it will shut off by itself. So we cleaned the fan and everything which is what we thought was the problem (and there was a lot of dust in it.) So then it still kept doing it. So we got a new power supply and changed that and it still kept going off by itself. So what else could be wrong with it? Thanks so much!

Answer 1

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Answer 2

You should try another power cord (I have hear of shorts doing that)

Try cpu fan speed. Check and monitor hardware.

Get some diagnostic programs like sandra or passmark to do some tests.

Boot and stay into bios to elminate its not a Virus in Windows. Check temp in bios and see the voltages.