Windows XP pc shuts down without warning

By DaveSlash ·
Greetings, Experts!

Last week, after about 30 minutes of use, my Windows XP Home (sp2) pc shut down without warning.

When I say "shut down", I more accurately mean "powered itself off immediately". At first, I though it was some strange power problem, but the pc successfully boot back up immediately after I pressed the power button.

The crash damaged my Norton AntiVirus, so I un-installed and re-installed it.

Then, the crashes became more frequent. Now, it crashes during boot-up after 30 or so seconds.

I thought it might be overheating, so I checked the two fans in the case and the CPU fan, and they all seem to be working correctly.

I suppose it could be some loose connection in the power supply.

What do you think?

Thanks in advance!!

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All Answers

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Sounds like a virus,however

by ComputerCookie In reply to Windows XP pc shuts down ...

most i've read about or seen usually prompt you to download a fix form some other virus program before it shuts down. When the computer trys to shutdown do you get any message, see if you can type "shutdown -a" into run, to cancel shutdown.

If you can download Spybot S&amp from
and Ad-Aware 2007 boot to Safe Mode and install and run. Also get AVG Free Norton is pretty poor, not worth the money!

Edit Add

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To me it sounds like

by The Scummy One In reply to Windows XP pc shuts down ...

your power supply is failing.

Also, are you plugged into a UPS?

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This could be from a lot of things

by zlitocook In reply to Windows XP pc shuts down ...

If you are patient and have extra parts or some money to spend you can try these things. But first if you belong to a company let the IT people look at it or if you are not familiar with working inside of a computer. Take it to a shop because some of these things can remove all data from your computer or make it useless.
Rebooting can be caused by a bad power supply, a dirty power supply, a poorly connected power supply. A bad CPU fan; a defective CPU fan, a CPU fan that has no or not enough conductor paste on it or a dirty CPU fan.
Rebooting can be caused by software, drivers or malware/virus programs. Rebooting can also be caused by a hardware issue like a floppy or DVD drive gone bad a bad memory stick or a Bios error. And there are other ways for a computer to restart. If you want to start trouble shooting let me know and I can walk you through each of these.
And if this does not help it could be a bad main board. But all is not lost, your data is still on your hard drive.

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This is what I would do for a start

by Jacky Howe In reply to Windows XP pc shuts down ...

A common reason for shutting down is the CPU overheating.

Faulty Fans, Dust and Grime build up on the Heatsink restricting air flow. I would give the inside of the case a blowout with compressed air and then remove the Heatsink, giving it a thorough clean and reseat the CPU applying new CPU grease. If the Fans spin freely when you give them a spin they are probably OK. If there is resistance replace them.

A faulty PSU can also cause it. Fluctuating power is no good for the motherboard. Try another one if available or replace it.

Keep us informed as to how you are getting on.

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oh, good catch

by The Scummy One In reply to This is what I would do f ...

I didnt mention blowing it out.

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You know

by Jacky Howe In reply to oh, good catch

it's funny when I reply to a Q, I wonder at times how much info is required. You never can tell if the poster would be game to remove the cover let alone anything else. But when he said that he has checked the fans I thought why not. Good call with the PSU that is second on my list.

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Inspect Caps on Motherboard

by willcomp In reply to Windows XP pc shuts down ...

I'd suspect a faulty capacitor either on motherboard or in power supply.

Inspect caps on motherboard for signs of swelling or leakage. Their presence is evidence of a failing cap. Absence of external signs does not mean caps are good though. They can fail with no visible signs.

Pay special attention to VRM caps around CPU socket.

If the motherboard caps look good, swap power supplies.

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Try to do

by cholan41 In reply to Windows XP pc shuts down ...

first u uninstal anti virus soft then u remove the memory and clean the contact portion then u remove the processor heat sink clean well refit then ,chk all conecting power cord insert well now u chk the system if it contiue it may the soft ware crash problem

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