I have no idea of what just happened. As I was logging on to my User Account, I noticed an additional Administrator account that surely wasn't there the last time I logged on. I had no idea what caused this strange account to come up. Trying to figure out more about it, I tried entering the account, but it had a password. And no, there was no 'blank password' already set up. I went back to my account to find that I had been knocked down from having administrator privileges, and now was stuck with the standard account. And of course, right when my iPhone breaks down and needs the latest iTunes update, I can't download it because I don't have my regular Admin privileges. Re-capping, there's another account randomly showing up, taking my privileges away, and locking itself with a password. So I can't delete it! I'll have you know I'm the only one on this computer, too. My old roommate's User Account, which had no password, was now also locked up with one! And I contacted her, asking her what she might have set the password to. I discovered that she had never even set a password. On the second try of logging into that account, it was now asking me to reset the password. But it still required an old password!! The account originally had standard privileges, but now, for some reason, I couldn't delete it from my account. Oh, and the icing on this disastrous cake is I'm leaving for a three-week vacation in a few hours, with a non-functioning iPhone and barely-functioning computer. Please, any help?