that the computer now has 2 Admin accounts ?
If so , you can delete the newly created one but using Dad's original account or even change the password or change the account type.
I created a new user (me) on my Dad's desktop pc. My user somehow became the administrator. I cannot recall the password. I can''t upgrade iTunes and all other online programs because the computer asks for the administrator password. Is there a way to retrieve it or get around it ?