Hello All, I'm having the odd glitch on my (relatively) new iMac 24" Core Duo in that every now and then it locks up. One time when it locked up it would not reboot until the pram was reset. Speaking to Apple Support they stated that this was a software problem. I have run full hardware tests and everything passes. When I have bought new machines I’ve always used Migration Assistant to copy over from my old machines so I’ve been from Powerbook G4 (Panther), Powerbook G4 (Tiger Upgrade, not clean install), Powermac G5, back to Powerbook after selling the G5 and then onto the Intel iMac. Front Row as never worked on my iMac and I have assumed that it has got corrupted somehow. Apple Support thinks that something is no longer compatible or needs upgrading software wise is causing the problem. I did have a lot of old software that I no longer used. Time for a clean install. Well that did not work. About once a week it will just freeze, no kernel panics just locked up. Sometimes I get the spinning beach ball but the solution is still the same in that I have to reboot to fix the problem. The problem is this is beginning to really annoy me now. I have eyeTV installed and recently went away for 5 days and the Mac crashed on day one losing all planned recordings during the rest of my holiday. Well I’m looking for advice on how I can identify the cause of the problem so I can get Apple to fix it. I'm edging towards a memory problem but all diagnosis on it have passed. Please help. Thanks. Glyn.