My PC keeps cutting out on meand has been doing this for about a week now. I had windows installed for about two years and at first thought it was a software issue, but I have wiped the HDD and installed everything from scratch and the problem remains. It tends to just switch off when I run a CD or a program and is impossible to turn back on without cutting the power entirely first. My second thought was that its obviously a hardware issue. I had a similar problem with an older PC when the fan on the CPU heatsink went and the CPU cooked itself but the fan is fine and the CPU is operating well within manufacturers recommended limits. Are there any other hardware issues that would cause a similar failure? I do realise as CPU's age they get heat damaged anyway from normal use so could just be that but I wanted to explore all possibilities before getting a new CPU. Thanks in advance for any thoughts.