Hi there, I have a 2009 MacBook Pro and lately its been playing up and constantly shutting down and restarting. So I want to completely restore it to factory settings. I currently run Mountain Lion on it and when I restore it, it will go back to Snow Leopard. So two question. 1. How do I restore it to factory settings? 2. Can I go from SL to ML without Lion? Thanks, any advice is greatly appreciated.