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Go to Administrative Tools > Services, right-click on the following services, and click Start:.Log in to the SQL server as the administrator.You have to remove the single-user startup parameter and set Microsoft SQL Server to Multi-User Moder before starting the Server again. When the master database restoration completes, the SQL Server instance will shut down. Set Microsoft SQL Server to Multi-User Mode. The "replace" command means the restoration process will continue even if there is a database with the same name, and the existing database will be removed. Run Transact-SQL command to restore SQL server master database. Click "Start" in the "General" tab to set the server in single user mode, and then click "OK" to close the dialog box.Click the "General" tab, and in the "Start parameters" field, type: -c -m.
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Double-click "SQL Server (MSSQLSERVER)" to open the "Service Properties" window.Log in to the SQL server as the administrator > go to "Administrative Tools" > "Services", right-click the service "SQL Server (MSSQLSERVER)" > click "Stop".Set your SQL server instance in single-user mode. Notice: If you haven't created any backup of SQL server database, skip this method and use Solution 2 to restore master database in SQL server without backup file.
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