The computer is stuck at the game. A friend clicked Ctrl + Alt + Delete, on the screen that appeared she chose "switch user". After logging out, she tried to log in again, but receives a message that the password is incorrect. On the login screen there is no way to switch the user, except that what he remembers has only one. We have already tried to turn off and turn on the computer, we checked Caps Lock, but she still has a password view and is 100% sure that she is entering the correct one. What is it and how do I do it to login.