Specs: 24" ALU iMac, Early 2008, 3.06ghz, 4GB Ram, 8800GS, 10.8.2 The machine keeps randomly hanging, seems to do it more when running iTunes. The music will stop, then about 10 seconds later all open windows become unresponsive. The mouse cursor still moves but clicking results in the beachball. I can however still swipe between full screen windows. Then after around 15 seconds the machine will pick up, the music will come back on and everything is normal. Seems to happen every 20 mins or so. Unfortunately I can never check Activity monitor to see what's going on. Oddly enough however I can run Netflix for hours on end and it will never freeze which makes me think it may be Hard Drive related as Netflix doesn't really require much data access. So far I've done a clean install, permission repair. Verified the hard drive and ran a full AHT. Everything comes back peachy. Any clues?