Kk, let's get straight to the point. This PC is purchased few months ago, and it had no user accounts at all. I just use the regular default admin account everytime. Til today, my geek wannabe sister created a new user account, then my PC started to log on 'useless_account' instead of the regular one we normally use when I start it up. The 'useless_account' is the 1st user account made in this PC, I want to get rid of it. I do not want any user accounts in this pc. How can I delete 'useless_account' and make my PC login its default admin account? I went into Debug Mode as Administrator and tried deleting the 'useless_account', but it doesn't let me to, I even tried ' Net User useless_account \delete ', it said no such account name. All I wanted is delete that only one user account and go back to the default account, because all my stuff are in it, I can't be stuffed to reinstalling everything in a new user account, so please help me, hope you could understand what I'm saying...

Please...