hi I got my iMac 21.5'' 2 days ago, and it has been working without a problem, untill today it randomly rebooted and after reaching the desktop it just rebooted again, and this loop would continue if I didnt force shut down. After leaving it off for sometime, I can work with it for about 10 minutes longer. I´m never doing anything very demanding for the computer, only a couple of applications open, nothing heavy going on. The top of the computer is hot, not enough to burn but quite warm. I called apple support and we were checking connections and reseting SMC and PRAM and NVRAM. Called a third time and the answer I got was "uhhh...I really don't know" I am obviously upset with this, since the computer is only 2 days old and apple support was completly unsupportive. I am thinking seriously of returning it, since it´s still younger than 14 days. I bought this on the apple online shop, if I got to an iSpot can I have this exanged in the hour? I dont really trust UPS, especially not the one that delievered this. If any of you ever had this issue and got it fixed, please do share what you did.