Hello,
Make sure you have SEP 12.1 RU1 MP1 to resolve the conflict with Trusteer.
Alternately, Remove Trusteer Rapport security software.
There were few fixes which were performed in the SEP 12.1 RU1 MP1 -
Web browsers terminate unexpectedly when Trusteer Rapport is installed with SEP
Fix ID: 2657350
Symptom: Trusteer Rapport is installed with SEP and the Application Device Control feature is enabled. Web browsers may terminate unexpectedly with the following errors:
- Firefox (firefox.exe): 0x00003dbe
- Internet Explorer (iexplore.exe): 0x0000a9f6
- Google Chrome (chrome.exe) 0x000c6ce0
Solution: The application and device control driver (Sysplant.sys) was modified to prevent this crash.
Reference:
New fixes and features in Symantec Endpoint Protection 12.1 Release Update 1 Maintenance Patch 1
http://www.symantec.com/docs/TECH187656
Hope that helps!!