I recently had a wierd problem, as I was switching user accounts [Windows+L] I got a message stating that I needed to type the password given by the administrator. Having not set any password, I found this to be a problem. My pathetic solution was just to log out every time, which owuld bring me back to the sign on screen; it was still an inconvieniance. Finally I restored to the previous week and I havn't had the error sinse. What could the problem have been, and what would a solution be if this were to happen again??