Hello,
Would it be possible for you to upload the SEP_Inst.log from the Client machine?
Suggestions:
1) Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\SMC
2) Select and right click SMC and choose Permission from the drop down menu
- In permissions add the User, Administrator and SYSTEM with full permission
3) Make sure the SYSTEM and Administrators accounts have full control to:
C:\Windows\
C:\Windows\System32\
C:\Program Files (x86)\Common Files\
C:\Program Files (x86)\
4) Reboot the machine.
I would also request you to check the articles below:
Troubleshooting Symantec Endpoint Protection installations: Checking rights and permissions
http://www.symantec.com/docs/TECH141644
Access rights with DCOM and SEP
https://www-secure.symantec.com/connect/articles/access-rights-dcom-and-sep
How to use the TestSec Utility
http://www.symantec.com/docs/TECH105027
To download the TestSec Utility, Create a case with Technical Support.
Create and Manage Support Cases
http://www.symantec.com/business/support/index?page=content&id=HOWTO31091
I would also suggest you to check these Threads -
https://www-secure.symantec.com/connect/forums/sep-upgrade-121-ru1-mp1
https://www-secure.symantec.com/connect/forums/endpoint-protection-121-could-not-start-service-error-1920-64-bit-machine
https://www-secure.symantec.com/connect/forums/error-1920-1
https://www-secure.symantec.com/connect/forums/error-1920-0
Hope that helps!!!