This is a registry hack on how to make windows automatically logon as a limited user. There are several users on the machine but you need one to be logged on as soon as the computer to be turned on. I always suggest this to anyone who has children. They can have their kids automatically logon as a limited user and they will be less likely to tear up the computer. I do this on Windows 7, but it is registry hack (regedit) on microsoft windows xp, vista, and 2000.