Here's the situation, I was online doing some shopping when all of a sudden everything froze. The light on the mouse went off and I couldn't do anything. I shut down the computer and rebooted it. It appeared to start normally until it go to the account selection screen. Everything froze again.
I rebooted but this time the pc didn't load anything up on the screen, and instead shut down after a mere 2-3 seconds.
I really need to use that computer and can't afford to buy a new computer and/or parts for it. It's only a year old and running Windows Vista 32bit. It has 3gb RAM but as I can't access the computer at all I don't know the rest of the specifications.
I have tried switching the power supply and cleaning the heatsink and fans but still the problem persists. It is not a problem with the RAM either because I switched the RAM but it still did the same. Oh and now the LED's in the power switch don't turn on at all, whereas they did earlier.
We tried doing the fan idea but to no avail. In the end we just decided it would be cheaper to just buy a whole new computer than pay out almost double for repairs. Thank you all so much for the help though.