In the properties window, select the Advanced tab, scroll down until you see Startup Parameters In SQL Server Services, right click on the corresponding SQL Server database engine service you want to start in single user mode and select Properties Please make sure the SQL Server agent service is stop before starting the SQL Server in single user mode Open up SQL Server Configuration Manager (SSCM) There are a few ways of starting SQL Server instance in single user mode. The SQL instance is required to be started in single user mode in order to restore the master database from the backup. This T-SQL command does not work for master database.

If there are users connected to it and you need to restore the database immediately, you can set database to single mode with immediate rollback option to roll back all incomplete transaction and disconnect all other user connection.

If the database already exists in the instance, the database needs to be set to single user mode to prevent other users connects to it. Restoring database requires exclusive access to the database.

Mssql restore master database