I have a Gateway PC with ME, 1.3 processor, 640 ram. Three yrs old. It will not boot up. I turn PC on, and I get to first screen, and then it bumps and grinds and whirs and chirps, and beeps. I hit F1 key and get a message that operating system cannot be found. I tried to boot from a Norton rescue disk but no good. It sounds like fan motor is on. Last week, the PC started to cut off (power) for no reason, randomly, and I would have to reboot. Has my hardrive crashed? Might it be something less severe?. Please help? Thank you. RD.