Why is my SQL Management Studio (SSMS) not managing to connect to my SQL Express?
One of the reasons could be that during the installation of SQL Express, instead of pressing Custom Installation, you chose Basic Installation.
If this is so, you would have missed out on a step during the installation process where you would have had to tick SQL Authentication instead of the default which is Windows Authentication.
But don't worry, there is no need to stay uninstalling and reinstalling them again.
First, if needed, change the password of the login user 'sa' by:
•Go into SSMS
•Logging in with the default windows authentication
•Open the security file
•Open the logins file
•Right-click on the user 'sa'
•In the General tab, one can change the password
•One can also make sure that in the Status tab for the same user, that the login option is enabled
In order to fix the SQL login issue, one must then:
•Go into SSMS
•Login with the default database with windows authentication
•Once logged in, right-click on the instance (first item in the list)
•Go in to the security tab
•Select 'SQL Server and Windows Authentication Mode'
Once applied, disconnect from the database and try and login with the default user 'sa' with the SQL authentication.
For more information about Installation, please look at the Installation tab in the Scan2x Handbook.