Hello, I've only had my macbook pro for about three weeks. When I tried getting onto Facebook, it redirected me to some mediaplex website! I looked up a way to reset safari, which I did, and it temporarily notified me that the site isn't trusted, so I didn't go on. And I tried to go on again, and was redirected to mediaplex without any warning! I'm extremely worried because this was a huge purchase for me and one of the main reasons I made the switch to macbook is because viruses are pretty much nonexistent! What do I do?