I bought a macbook (the white midline model with 2GB ram) in early February, and am generally very happy with my purchase, but I can't help feel as if something is slightly off. I notice lags in such simple things as switching windows, or closing tabs. Sometimes it even takes half a second for text to appear after I've typed it. Also, in the first two months, the fans never ran at all (unless I'd used a computationally intensive program, which was rare) Today, the fan was on all day, even when nothing was going on. I use the computer to read email, use the internet and chat with my friends - nothing fancy. I've used mac G4 and iMac machines and they are all blazingly fast. I can't help feel gipped that it takes 5 seconds to open firefox in the morning when on the iMacs at our school it opens instantly. Overall this computer is much better than the one I had before. Am I being too picky in expecting the macbook to be faster than this? Is there a way I can check to see if there might be a problem? Any help would be great. Thanks to everyone in advance.