How to: Start an Instance of Notification Services (SQL Server Management Studio)
Each instance of Notification Services has an engine on each server that runs a hosted event provider, generator, or distributor. Typically, the NS$instanceName Microsoft Windows service runs the Notification Services engine. You can start all Windows services that are associated with an instance of Notification Services by using Microsoft SQL Server Management Studio.
|This procedure does not apply to clusters. On a cluster, you must use Cluster Administrator to restart the Generic Service that is configured to run the instance's Windows service.|
In Object Explorer, expand the Notification Services node.
Right-click the instance of Notification Services that you want to start and then select Start.
Notification Services attempts to connect to each server that runs the NS$instanceName service and start the service. A dialog box displays the status for each service.