Man, wish I'd found this topic earlier. I've been helping people with this problem for years. Currently Akaria had it. I left her offline messages that it was happening and to change her password. Hasn't happened since

But yeah. Its strictly a password issue as some have mentioned. Nothing to do with the security of your computer or the programs on it. And I agree that its probably more on microsoft's server's side than anything. So saying "be careful what you click" probably isn't the solution. Though I'm pretty sure its never happened with my account..