Hi All, so about 18 months ago I was able to purchase a MBP 1.83 ghz core duo machine. Until recently it has been my pride and joy, but of late my beautiful machine is overheating. At any rate, it took me lots of scraping and saving to be able to purchase this machine and now I am still able to web-surf and email and all is fine, but as soon as I start doing anything that's cpu-intensive it's a no go. I have looked all over the place for some software to just underclock the cpu so that it won't overheat and have been unable to find any such thing. I'm pretty handy and have replaced the hard drive and added some memory, but I had the top cover off yesterday and I'm not prepared to handle pulling out the logic board. The battery has also never worked properly, and my machine has proper serial for battery replacement, but the battery does not. So Apple said no-go on battery replacement. If I knew for sure that buying a new battery will stop the machine from overheating I would easily spend the money on it. Please do give me some advice, I do love my machine, but if push comes to shove and this will end up costing me thousands to fix, I'll probably just go buy a Dell because I can have basically the same specs on a dell for around $999 but with the cooler running core 2 duo...course that might also overheat. Oh and to make matters worse I was in the Apple store and asked one of the geniuses and he said that Apples don't overheat and he can't imagine anyone having issues like that with a MBP. I should have walked him over to one of the machines and googled it for him. Anyway, all please, please give me some advice here, when I bought this machine I was intending on it being an *investment* and being able to use it for a good 5 years before needing a new one.