Damn. I'd recommend offline backup and re-install, or try NTPasswd (http://pogostick.net/~pnh/ntpasswd/ http://pogostick.net/~pnh/ntpasswd/) to reset and enable

Damn. I'd recommend offline backup and re-install, or try NTPasswd (http://pogostick.net/~pnh/ntpasswd/ http://pogostick.net/~pnh/ntpasswd/) to reset and enable the Administrator account, then password reset your account from there. It will almost certainly break the MS account sync, and I'm not sure what state your account will be in with regards to online services etc, but it should at least allow you to access your account on the PC.