Hi everyone! I am having the same noise problems that others have mentioned before, and I am trying to find the fix. I notice when I press the mouse down the noise stops and I get noise from hard disk activity. A high pitched kind of noise. Apple has told me to take the computer to Compuzone to have it checked out, but I can't be without the computer so I was wondering if there is something I can do to fix the problem. The apple guy tried to get me to buy the Apple support and told me that even if I took the computer to Compuzone and they found it to be a software issue they would still charge me. How can they say this is software? Is there a different cooling system or power supply I should buy? Thanks all, Paul