Hi,
Thank you for posting in Symantec connect.
I would be glad to answer your question,
None of the SEP 11.x version is supported with Windows 8.
Latest version by Symantec for SEP 11.x version is SEP 11 RU7 MP3.
System requirements: 11.0.7 Release Update 7, Under Supported operating system Windows 2012 server is not listed.
http://www.symantec.com/docs/TECH165172
Symantec started supporting Windows 2012 with SEP 12.1 RU2 version. You can upgrade from SEP 11.x to SEP 12.1 is using SEP 11.x version
Check this article for more details:
About Windows 8 and Symantec Endpoint Protection 12.1
http://www.symantec.com/docs/TECH174348