Ideally the net start/stop based scripts work just fine, I have them configured on my enforce as well. Is there a specific error you get during the batch execution?
It would be nice to validate this in parts. Could you simply run: net start "Vontu Manager" on the command prompt, to test.
At times it could just be a simple error like "System error 5 has occured". In that case, we simply need to open command prompt as Administrator and try the same command again. If works, we then need to run the batch scripts as an admin each time.
Depending on the error there could be other issues, which we could address - let us know.
#######START SCRIPT######## (paste script after this line & save as abc.bat):
net start "Vontu Notifier"
net start "Vontu Manager"
net start "Vontu Incident Persister"
net start "Vontu Monitor Controller"
net start "Vontu Update"
#######STOP SCRIPT######## (paste script after this line & save as xyz.bat):
net stop "Vontu Notifier"
net stop "Vontu Manager"
net stop "Vontu Incident Persister"
net stop "Vontu Monitor Controller"
net stop "Vontu Update"