Computer shuts down by itself

Hey does anyone know why my computer is shutting off all the time. And when i turn it back on after it shuts down it won't come on i have to wait like 30 min and turn it back on. sometimes it shuts right back off after i turn it on and it loads. I have no clue what to do can anyone help.

EDITOR'S NOTE: No clue? Even after reading the article? Which of the suggested remedies did you try?

Same problem here. But mine is quite different. It shut down like the fans and cpu turns off but when I take a look at the led on my cpu it is lit in yellow green.. The shut down happens in random. I do understand that I can consider that this is caused by over heating, but the thing is that this problem started when I clean the dust from the cpu fans to incerase air flow to the processor. Another problem is that after booting it up since I really need to power cycle the main pc, my documents and all newly installed programs before it shuts down was deleted. Most of the time if the files are saved from default windows folder like my docs, my music etc. It like it performs a system restore after the shut down. I do have Panda 2008 Antivirus. Any suggestions? Im running win xp pro, Intel P4 3.0HT, 1G ram (512 each inserted in a ddr2 533 dimm), 128 VGA.

i have a sony vaio laptop with windows xp i bought it in 2005 not sure the model , it has been shuting down randomly on its own . at first i noticed it was only happening when i watched news or youtube for more than 15 minutes at a time , might have just been a quinkydink . when i turn it back on it takes forever for windows to start up can u help tx

EDITOR'S NOTE: Sounds like an overheating problem, I'd have the internals checked out at a service center.

Thanks for the cleaning tip. Saved me from heat up of CPU.

I have a problem with my PC shutting down by itself.
I have a dual boot system with XP and 98.In XP it is fine but in 98 it shuts down at random intervals. May be after 20 minutes, sometimes an hour or longer.It seemed to me to start doing this after running cc cleaner.I have run this program before though without problems. Unfortunately I have to use
98 at the moment.There are no error messages it just shuts down.However I have noticed a few odd things like missing icons or missing color from icons in the START bar etc.

EDITOR'S NOTE: Why is it that you need to run Win98? Maybe there's a workaround...

help! my computer shuts off IMMEDIATLEY as it is taken off charge. I can never move or go wireless with it! it drives me crazy. Do u think something is wrong with the battery?

EDITOR'S NOTE: Laptop batteries are controlled by electronics and sensors inside the battery and in the computer that can fail. So yes, most likely your battery is toast.

My computer was running so well after i restored it with the restoration cds but after a while it shutoff on me and when i went to turn it on the light would go on and the fan would start to move then stop.I have to wait a period of time before the computer can start and even then the computer will shut down. Any ideas of whats go? is it overheating or are my computer parts failing?

my computer shuts down automatically and when i turn it on, it doesn't turn on and i have to wait 15-20 minutes before it turn on. and my cpu is easily becomes hot even if i used my computer for only 1 hr. what will i do to this problem? pls. help me

EDITOR'S NOTE: You might need to replace the CPU fan. If that doesn't help, the CPU itself may be defective. I'm assuming you have in fact monitored the CPU temp and found it to be high...

my computer log itself off imediatly after logging on and i dnt know how to fix it,i tried using the Windows system32 repar tool i downloaded but it dont work cuz i dnt know how to run it and i cant have any access to anything

hey!! my PC shutdown automatically, when i`m playing freestyle can anyone help me to solve this porblem?