There are two options available:
1. Click on the Drop Down beside to Secure agent and select "Enable or Disable Services"
By doing this Service wont show up inside secure agent.
2. You can clisk on the secure agent and then select the specific service and manually stop it.
By doing this the service will show up inside secure agent but with status "User Stopped" and even on secure agent restart this service wont start on its own, you need to manually start, if required.