I have an old ArcGIS 10.1 in my laptop. While I'm trying to create a geodatabase it gets created, but doesn't let me create new featureclass and/or feature dataset. I get the error:" failed to connect to database. bad login user."
Is there something I'm missing here? I'm the admin on my laptop, and SQLExpress(V.2012), which has been installed by me. Though I don't know if I'm logging in as SQLEXPRESS' admin. I don't remember the credentials, I have definitely left it as default though.