Hi. What is the best way to completely erase everything on the computer so that images are not in the RAM or temporary memory anymore? I was looking at bikini models and I was redirected to another porn site. It popped up a bunch of other sites too. I would just like to start new with this computer by reinstalling the operating system so that everything is completely erased. I read something about reinstalling Mac OS X multiple times to completely erase everything. I have a MacBook Pro. Thank you.