Well, I've had my iMac since August, and it's been working fine. I've been doing plenty of editing, browsing, etc. It's a Mid 2011 27' i7 with 4GB of Ram, and a 1TB HDD. Today I was playing some music in iTunes, and I noticed that the temperature of the mac was at 50 degrees c. I waited a while, and suddenly iTunes began to freeze. No biggie, I quit iTunes and life went on. Tonight, the same thing happened, but now, it seems the iMac is permanently slowed down. The temperature is back to normal (30 Degrees), but everything is super slow and freezes all the time. I can't open an application or a few pictures without it freezing with the spinning beach ball, and me ultimately having to do a hard restart...only to find that the problem still persists. So, just to clarify, my iMac was working perfectly fine, and now suddenly, everything is lagging and freezing, no matter how many times I restart it. Im insanely annoyed. I just turned the iMac off to see if it's fixed itself by tomorrow. I'd really appreciate advice. Please, help!