administrator

About six months ago I enabled the main administrator account in my
daughter's computer (Vista Home Premium) in an attempt to limit her time
on My Space. Unfortunately, my attempt was in vain as every time she
wanted to change sites, it required my password. So, I went back in
deleted the changes I had made to her system. Or so I thought. It was
still nagging us for my password. Somehow we got around that. Now, it
will not accept my password PERIOD. I cannot run any maintenence
programs, download any new programs, or anything that requires
administrator rights. I've tried everything including safe mode and cmd
exe, and it still tells me that my password is invalid. What can I do?


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dynty