Hi guys... I have a 2.4 black macbook. I'm running snow leopard 10.6.4. My macbook is irritating me. It heats up very quickly and the fan starts to rev up which is very noisy. It goes up to 6500 rpm easily, and this happens the most whenever I'm watching videos on youtube. Once I was talking to my family on skype and they thought somebody was vacuuming in the background! And when I'm surfing the net the browser sometimes hangs on me and that colorful circle starts spinning and everything freezes for a second or two till everything goes back to normal. Does anybody know why?!?!