1) The selection item to disable all Virus and Spyware protection features is available / enabled by default.

To disable Virus and Spyware protection feature access on a SEP client:

Logon to the SEPM --> Policies ---> Virus and Spyware Protection ---> Virus and Spyware Protection – Balanced --> Protection Technology --> Auto-Protect --> Check mark / lock Enable Auto-Protect

Confirm on Client, as seen below, the option "Disable all Virus and Spyware Protection features" is grayed out.

2) Disable Proactive Threat Protection is also enabled by default 

Logon to the SEPM --> Policies --> Virus and Protection policy – Balanced --> Protection Technology --> SONAR  --> Lock Enable SONAR

Confirm on client, as seen below, the item "Disable all Proactive Threat Protection features" is grayed out.

3) Disable Network Threat Protection access on SEP client.

Go to the Specific client group > Policies > Location specific setting > Client user interface settings > Edit settings >  Uncheck Allow user to enable and disable firewall

Check on client, as seen below, the option "Disable all Network Threat Protection features" is grayed out.

4) Disable Symantec Endpoint Protection feature is also enabled by default. 

1) In the SEPM, under Virus and Protection policy lock all the items which are unlocked

or

Select Virus and Protection policy- High security, it will lock all the items as a policy default.

2) Go to Specific group > Policies > Location-specific Settings > Client User Interface Control Settings > Tasks > Edit settings > Server Control > Customize > Uncheck the following two options

i) Allow user to enable and disable the firewall

ii) Allow user to enable and disable application and device control policy.

3) Also perform the following changes In the Policies tab of the SEPM:

1. Click  Intrusion Prevention Protection policy.

2 .Click Setting, then lock this feature by clicking the lock symbol next to Enable Network Intrusion Prevention and Enable Browser Intrusion Prevention.

3. Click OK.

Check on client, as seen below, the option "Disable Symantec Endpoint Protection" is grayed out.