block user's ability to disable Symantec Endpoint Protection on Clients

hi guyz 

i am using SEPM12.1.3 andi want to block the user ability to disable sep clint . in this regard i have research alot and  found myny usefull articales like the one bellow 

http://www.symantec.com/business/support/index?page=content&id=TECH102822&locale=en_US

http://www.symantec.com/business/support/index?page=content&id=TECH168990

https://www-secure.symantec.com/connect/articles/how-disable-sep-features-client-gui-sep-121#comment-8994981

by following these links i have been able to block the "disable virus and spyware  protection features" and "Disable proactive threat protection features" but i am not able to block "desable all network threat protection features." so due to the i am not able to block " Disable symantec endpoint protection".

for refrence i am attaching a file that show that i have unck these option for NTP but still its not working. need hel guyz.