How to: Stop an Instance of Notification Services (SQL Server Configuration Manager)
Each instance of Notification Services has an engine on each server that runs a hosted event provider, generator, or distributor. Unless you are hosting the engine in your own application, the NS$instanceName Microsoft Windows service runs the Notification Services engine. One way to stop a Windows service is through the Windows Services Manager.
|This procedure does not apply to clusters. On a cluster, you must use Cluster Administrator to stop the Generic Service that is configured to run the instance's Windows service.|
On the Start menu, point to All Programs, point to Microsoft SQL Server 2005, point to Configuration Tools, and then click SQL Server Configuration Manager.
In SQL Server Configuration Manager, expand SQL Server 2005 Services, and then click Notification Services.
In the details pane, right-click the instance of Notification Services and then click Stop.
A red box on the icon next to the Notification Services instance name and on the toolbar indicates that the service stopped successfully.