[haramer]

Okay, so I had many problems with my computer, and it was mainly viruses and such. However, when I try to turn on my computer, it will turn off on its own after like 3 seconds. It just turns off... then like 2 seconds later it TURNS ON ITS OWN...... help?

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Have you tried tapping F8 during boot up to get to safe mode?

If you get to safe mode try last known good configuration.

Have you added any new software or hardware before this started?
Is this a laptop or a desktop?

[123Runner]

Have you tried tapping F8 during boot up to get to safe mode?

If you get to safe mode try last known good configuration.

Have you added any new software or hardware before this started?
Is this a laptop or a desktop?

[haramer]

Nothing shows up on screen... I can't even go there.

Its a desktop and I think the motherboard went highwire.

[Brother Bill]

I've heard of a faulty power supply behaving in this manner. If you have a tester, check your voltages. Or you can use a multimeter. The link below will help you through the process.

How To: Test PSU Voltages

[123Runner]

Laptop or desktop?
When was the last time you cleaned out the fans and vents?

If desktop, make sure the CPU fan is running.

[haramer]

Desktop, I just like vacummed the vents and fans. The fan is running, same with the video cards... then it obviously stops when the computer shuts down.