In windows auth mode it sais cannot connect to user: ".
exactly like that: ".
Because is not related to any trusted connections.

And in SQL Auth mode it sais login failed for user: <myuser> and <my password> that i set for it from sql configuration manager.

I don't know any default logins. I tried u:sa p:sa it didn't work.

Know any others? If i repair or uninstall/install SQL Server will it be fixed? Any other way to reset this?