Xp login account problem

I don't have any password stored for administrator/user account (my only account) yet when I boot up Windows I get a request to insert a password in the Administrator account. I have to click Cntrl-alt-delete to get the log in to where I can change the name manually from Administrator to Owner and then without entering a password I just hit enter and the windows comes on. I went into Run control userpasswords2 and have have it unticked where it says users must enter a user name and password. I used to have auto logon so that no clicking was needed but then I messed with it at created a password and now can't seem to get it out of there.