So, a friend of mine has just traveled abroad, and has had a serious issue with his MacBook Pro and he can no longer use it. Here is the situation: After unlocking his original iPhone so that he can access other carriers while traveling, he plugged the iPhone in to his MacBook Pro and the computer reset to the login page. He has never used a login/password for his MacBook but it suddenly is giving him the login page that users need to use to access OS X. It has "Mac OS X" followed by the computer name, a login bar and a password bar. As mentioned he has never used a password/user name on his computer and does not have a guest or other user account in his preferences. When he inputs anything to the user name/login page the window shakes as if to say, "No, wrong answer." He also has tried just pressing enter without any information, and it does the same thing. Not sure why this is happening, and Apple said he needs to take it to a store or reinstall Leopard. If someone knows a way around this, it would be greatly appreciated as he is in England without a computer.