Kai-Uwe v. d. Ohe said:
In an elevated command prompt type:
"control userpasswords2", then press the Enter key;
(of course, type the line without the quotation marks).
A window will pop up with several options. Look
trough them and find the option for users to login with-
out to have to type in the password at logon. You
have to type in the password within this dialog twice
to confirm it, but on the next reboot you don't have
to anymore. That's how I remember the procedure to
my best knowledge. I'm on XP right now, but will
check later again, if I find I gave a wrong informa-
tion at some point.