[Home] User account not showing up

[User Needs]

Need some help here with something I have never seen before.
It's my daughters PC!
She is not showing up in user accounts or control userpasswords2!
I do under my account, if I try to create a account with her username. I get account already in use. But it's not there, there is a Documents and Settings folder with her username on it. But thats all I see!
And I am able to login on her account, even after a reboot!

And I am doing a online scan (Bitdefender) now.

Thanks
UN