During a Prime95 Torture Test (Small FFTs) after about a minute into the test, something kept clicking in ~7 second intervals. I opened my case, and noticed that they were coming from my two hard drives (80GB EIDE, 250GB SATA). Apparently it seemed like they (or maybe it was just one of them?) were turning on and off (whirling, click, no whirl, click, whirling, click, no whirl) and while they weren't whirling, my computer screen would lock up including mouse control, but when the hard drives started to whirl again I regained control. ANyways, the reason why I ran the Prime95 test was because while using the computer, I would get a click and my computer would lock up. Does anyone know what the problem could be? I just replaced my 80GB hard drive too since I thought that was the problem but I guess it wasn't. Could it be the processor (Small FFT test stress tests the processor right)? THanks