So, lately it seems that my fans are on all the time. Even when I'm not doing anything. I have a 2009 unibody... the first version that you have to log out to switch graphics cards. My fans were kicking on when I was viewing a rather small quicktime movie. They usually don't come on unless I'm watching a large HD movie in Flash player. I switched graphics cards to the higher performance one, then shut down all programs that weren't running. Then I lowered the brightness on my display. An hour later and my fans are still running fairly fast. I realize that fans kick on when the machine gets hot. But, in the past, they have never ran as much while doing so little. I prefer quiet and it bugs me to hear my fans whirring so loud when I don't think they need to be. I'm under Apple Care, but I hate to take it in. It's my only computer and I don't want to be without it for the week that Apple will probably keep it. If I could self-diagose to solve the problem, that would be great. Anything you can think of that I might try would be greatly appreciated.