i know how to open pc if there is Username and password

i know how to open pc if there is password and username
First thing open your pc and press F9
then open in safe mod
then u will find adminstrator
open it the go to control pannel
then go to users
create new account for you if u want then delete it befor your dad come
Or you can remove the password with write the old password and u can change it also
for any Question add me shawish_00@hotmail.com
or contact me at www.shawish.tk