A mate of mine's pc has started taking a long time to boot up. Basically, the pc gets to the windows loading page with the coloured bars moving left to right, and hangs there for a long time, causing him to have to press the reset button. he does this about 6 times and eventually the pc boots up and works fine. He has since replaced the mobo, hardrive, checked the memory with prime95 for about 12 hours, so it doesn't appear to be any of those.
Any ideas?
Any ideas?