This thread looks to be same issue as yours, see if same solution helps:
https://www-secure.symantec.com/connect/forums/how-block-users-ability-disable-symantec-endpoint-protection-clients-1
Have you seen this KB article as well:
How to block a user's ability to disable Symantec Endpoint Protection on Clients
Article:TECH102822 |
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Created: 2007-01-05 |
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Updated: 2013-03-19 |
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Article URL http://www.symantec.com/docs/TECH102822 |