Thank you, this worked on a computer I bought second hand. Its not that I didnt have the password, I just wanted to be the only admin on the computer. Now just to make sure if I deletted all their info, they cannot screw with my stuff? They cant use the finder stuff and change the passwords on me and look at my stuff. I didnt buy from a friend, it was craigslist. I just want to be secure, its now like brandnew settings?