forgot adminastater password

I'm trying to get my old system with Win XP pro set-up in
my sons room and I forgot my sign in password. How can
you get past the log on window for the adminstrater so
you can access windows? I didnt set-up a password hint
and or a password save disk?

>-----Original Message-----
>I'm trying to get my old system with Win XP pro set-up
in
>my sons room and I forgot my sign in password. How can
>you get past the log on window for the adminstrater so
>you can access windows? I didnt set-up a password hint
>and or a password save disk?
>.
>did the same thing. If you figure out how to get in let
me know-PLEASE