im intelligent

So i went on my server computer to secure some stuff, and did the usual like renaming and disabling the default admin, turning off guest, etc. Normally this is no big thing, because i just keep using my user name.

I failed to realize on the server my username WAS the default admin, now i cant login to it or guest and there arent any other accounts.....any ideas how i can fix this WITHOUT a format?

Nevermind, i realized if i load safe mode then the account is no longer blocked out. I guess if u disable a guest account all u need to do is go to SM and login.....wow.