Just built myself a new PC (first time builder), and now I am having a little problem. I've had the PC for about 2 weeks, and the past couple of days I get an error message on startup. It says something like, "A disk read error has occured, press alt+ctrl+del to restart". So I press alt+ctrl+del, it restarts and shows up again. I go into the BIOS menu, everything seems in check. Get the error message again, so I just press the power button on the tower and the PC turns off. I turn it back on a few seconds later and it loads Windows fine (Vista 32bit). What could be causing this problem? And why does it work after I turn the PC off using the power button? That is the only way I can get Windows to load, it has worked a few times now...