Hello, I have the 13'' Macbook, this is the second one I've had in the past half month. The first one had a constant whine coming from the hardrive, so they gave me a new one, within days this one started doing it too, but I've just learned to live with it, my room is really really quiet so whatever. Anyways, lately my new one makes a parking head noise usually when I'm not doing anything, if I just leave the keyboard and trackpad alone, it does it maybe one or twice, but I've read that's normal, I think. However, lately it's starting to make that noise that all computers make when it 'thinks', that little light noise that I can't describe, but you probably know what I'm talking about. It didn't do it before and I can't seem to click a link online without hearing it, it's not too loud, but I just want to make sure that's normal considering it only just started becoming audible. Does anyone else's do this? Can you hear yours 'think'?