I was just using my computer, doing nothing intensive, bit of light surfing, infact I was not doing much, just about to type something when *poof* reboot!! It came up with the post screen saying HP computer or whatever and had the 'hit f1 for setup' 'hit esc for whatever.." I noticed on this screen, that there appeared to be a 'dead pizel' it was white when it should have been the blue background. Then it rebooted again. I switched it off at this point, I though I would leave it for a while and let it 'cool down' (although there was nothing to indicate it was over heating or what ever). Background to this isI have recently installed a new x2 amd processor, i think it had once rebooted before with that new processor in. I had also recently installed an extra gig of memory, I think it may have reboot once before since then but my memory is not to confident of the exact timings of things. So what does that indicate? Processor problem? Memory problem? Anyway I am up and running as normal now but a little concerned. I guess time will tell if this is going to be an ongoing problem, or worse still get worse. Its a HP Pavillion 1309 IIRC x2 3800 AMD and 2 gig of DDR memory. This obviously sounds like hardware. Bad memory or bad processor? The 'bad pixel' on the screen indicates bad memory perhaps? Or maybe it is the processor, however it was not running under load at the time. I have my old processor and memory (I have both the old and new memory in) so I could go back to 'previous PC' so to speak. However it depends on how frequent this will be assuming it reoccurs. Memory was shipped 9 days ago, processor 5 weeks ago. So I will have to keep my fingers crossed it does not occur again, I don't think there is much else I can do until the problem start to reappear on a regular basic.