Even if you change all the information from the same computer, its still compromised. Reformat and start over from scratch, but before that change all the info from someone else's computer. And as Zack85 said, clicking on wierd stuff in ur email, going to gil seller sites = Easiest way to get ur account hacked. Some of the gil seller sites got injections that auto installs key loggers to ur system without you even getting a notice of it.