I hope you can help me.
My PC keeps turning off without warning. I have cleaned out the heatsink and all of the fans in the case and in the PSU. It would usually turn off just after starting Windows but sometimes it has turned off during start up. Once it even turned off when I was checking the CPU temps etc in BIOS before loading Windows, the temp was 36 C when it happened. I have just reformatted the hard drive thinking is was a software fault and the PC stayed on for about two hours without turning off while it was doing this. But when it was reloading windows for the first time, it turned off again! After reading some of the threads on this forum, I think maybe it could be a PSU problem.
What do you think it could be?