I have an aluminum and glass macbook with the 2 ghz intel core 2 duo, 4GB of ram, and 160GB hard drive. I have had nothing but problems since I updated my computer to lion. I started out with leopard. My stuff is backed up to my time machine. How would I go about doing a fresh install to start completely over? I'm sick of the slowness and issues I'm having. Any help would be great!