I have a 3 year old Black Macbook from 2007. It is my first mac. It has been speedy for these three years. Im on it after watching porn admittedly, and all the video sites like youtube, metacafe, espn highlights in articles, all stutter or pauses throughout the video even though it's fully loaded. Sometimes it will just freeze. And when these instances occur, the mouse pointer is freezes, the volume buttons freeze and the volume mutes automatically. It's never really happened to the macbook before and the internet signal is strong as usual. It slows everything down when these situations happen. I usually close safari and then reset safari. I also tried opening iTunes, and it just bounced for a long time. Finally said there was a problem opening it and asking to report it to Apple. I am starting to freak out that my macbook is starting to turn out like my damn dell. It got all messed up after 3 years and threw it out bc of viruses. What do I do?!....I learned my lesson as well....the porn...has gotta go.