Note Before stopping an instance of Microsoft® SQL Server™, you should pause SQL Server and stop SQL Server Agent to ensure the most orderly shutdown. You can stop both by using SQL Server Service Manager.
To stop SQL Server or SQL Server Agent (Enterprise Manager)
Note Stopping an instance of SQL Server by using SQL Server Enterprise Manager or the net stop mssqlserver command causes SQL Server to perform a checkpoint in all databases. Then a SHUTDOWN WITH NOWAIT is done to flush all committed data from the data cache and to stop the server immediately.
To stop SQL Server or SQL Server Agent (Service Manager)
This connects you to the remote server and populates the Services box with the names of the SQL Server services registered on the remote computer.
If you are stopping SQL Server Agent, proceed to Step 4. Otherwise, send a message informing connected users that the server will be shutting down. After an appropriate interval, proceed to Step 4.