Random Shutdowns

[Moon Rabbits]

My computer has recently taken up the habit of shutting down at random intervals :(

I don't know exactly what I did to start it doing this, I didn't download anything fishy or anything like that. Basically, I'll use the computer for about half an hour and it will just shut down completely.

It's not an Energy Saver thing, I turned those off (for some reason it was set to shut down after 15 mins.), but it's still doing it.

Any help would be much appreciated.

[Samuraid]

Most likely, the shutdown is related to either:
- components in the computer overheating
- an unstable power supply

Does it shut down when you are running any programs that use a lot of computing power? Or is it completely random?

[rubah]

or does it only happen when you open certain programs, like say the GIMP.

[ValiantKnight]

Most likely, the shutdown is related to either:
- components in the computer overheating
- an unstable power supply

Does it shut down when you are running any programs that use a lot of computing power? Or is it completely random?

These two are likely it. The only other probable answer would be if you get a message about shutting down(which relates to a windows vulnerability and an old virus/worm that shut down windows alot)....But it typically happened within 5minutes of bootup.

As above posters asked, is it happening during certain programs or ?