You can uninstall the Message Engine NT service in a similar way to how it is installed. Before you begin, open the Local Services utility (Services.msc) in Windows and stop the instance of the Message Engine NT Service you want to uninstall.
To uninstall the Message Engine NT Service, open the Command Prompt as an Administrator and run the following command:
sc delete [Service Name] binPath= "\"[Path]\MessageEngine.NTService.exe\"" start= auto
Where [Service Name] is the name of the service and [Path] is the path to the Message Engine source installation files.