Hello,
Reboot into safe mode and try logging in as the built-in administrator (even
though it is disabled, this is supposed to work - unless all the
enabling/disabling of accounts has confused it).
You could also try booting the DVD and going to recovery options, if that
doesn't work.
--
- JB
Microsoft MVP - Windows Shell/User
Windows Vista Support Faq
http://www.jimmah.com/vista/