To stop a backup or restore job while it is in progress, stop the SQL Backup Agent service. You will need to restart the service to allow other backup and restore jobs to run.

1. From the Windows Control Panel, select Administrative Tools, then Services.
2. Find the SQL Backup Agent service for the relevant instance of SQL Server, for example SQL Backup Agent-<instance name>. The SQL Backup Agent service for the local instance is called SQL Backup Agent.
3. Right-click the service and select Stop. To restart the service, right-click it and select Start.

It is not possible to stop the SQL Backup Agent service using the SQL Backup graphical user interface.