I have 2 instances, sqlexpress and mssqlserver. I made fool mistake, I disabled the login account that I used it all of the time to login in mssqlserver using windows authentication. And I don't remember the 'sa' password because never use it to log in.
I have read and practice some tips about this problem, and Connect to SQL Server When System Administrators Are Locked Out but my problem still isn't solved.
So, my questions. Does uninstall then reinstall can give me access again? If yes, which should I uninstall-reinstall? My sql server or ssms? I'm not worried about databases, I just want the access to this instance again for learning.