My iMac been constantly freezing. It stopped doing it for about a week so I hoped all was well, until it started up again. I decided to finally take it in to Apple on Friday for a repair. I ended up having to wait a couple hours, but it was kindof entertaining sitting at the genius bar. Anyways, they said it was most likely a hard drive problem and would replace it. I get a call saturday nite (24 hours, wow I was impressed!) that it was fixed and ready for pickup so me and a friend drove down. I picked it up, brought it home and plugged it in. All was fine for a couple hours, then the freezing started again. I called Apple and they said to bring it back in as a priority repair. Does anyone have any suggestions on what I should say/ask for when I take it back. I doubt they would put in another bad HD, that the problem is most likely something else. What do you guys think? Thanks, allison.