Hello,
What version of SEP 11.x are you carrying?
In your case, you could either Uninstall the Network Threat Protection Feature by:
1) Go Add/Remove Programs
2) Select Symantec Endpoint Protection
3) Select Modify
4) Uncheck the Network Threat Protection and Application Device Control
I case, you feel you want to Uninstall Symantec Endpoint Protection Entirely, you can do the same as well along with Liveupdate from the Machine.
Since, it has been received from your company, the SEP 11 is a Licensed Version. However, since you have moved, you can make your choice.
Hope that helps!!