My new Santa Rose Macbook that I recieved last week was running perfectly until yesterday when I went to turn off and it wouldn't. It's done the exact same today in College and it just stays on the shut down screen and I have to force quit. Also, Temperature is always pretty hot and fans are usually either hardly running or spinning like a beast. Shall I try re-installing leopard as this was my first idea or shall I call up Apple? Thanks, James! Week old macbook owner!