Hello,
Symantec AntiVirus Corporate Edition 10.2 Maintenance Release 1 (MR1) and higher includes support for Windows 2008.
SAVCE 10.2 MR 4 introduced client-only support for Microsoft Windows 2008 Server SP2 and Windows Vista SP2. The Symantec AntiVirus Server, Symantec System Center and deployment tools have been modified to support the management of clients that run on Windows Server 2008 or Vista, but the management components cannot be installed on these operating systems.
SAVCE 10.2 Client support for Windows Server Core 2008 was added as of SAVCE 10.2 MR2.
Symantec AntiVirus Corporate Edition 10.2 MR3 and later are supported on Windows Server 2008 R2. All previous versions of Symantec AntiVirus will not run on Windows Server 2008 R2.
Symantec Endpoint Protection 11 MR 4 and above (client and SEPM manager) are supported on Windows 2008 Server. On Windows Vista, only the SEP client is supported.
Symantec Endpoint Protection 11 RU5* and above (client and SEPM manager) are supported on Windows 2008 Server. On Windows 7, only the SEP client is supported.
*Recommend you to install Symantec Endpoint Protection RU6 MP2 and above.
Starting with the release of 11.0.5002.333 (RU5), SEPM supports Microsoft Windows Server 2008 R2 (all editions except for Itanium), and Microsoft Windows Server 2008 Service Pack 2 (all editions except for Itanium).
References:
About Endpoint Protection support for Windows 7 and Windows Server 2008 R2
http://www.symantec.com/docs/TECH94910
Release notes for Symantec AntiVirus 10.2 Client for Vista and Windows Server 2008
http://www.symantec.com/docs/TECH102297
Support for Windows XP SP3, Windows Vista SP1, Windows Server 2008 with Symantec Endpoint Protection 11.0
http://www.symantec.com/docs/TECH105011
Release notes for Symantec Endpoint Protection 11.0.x and Symantec Network Access Control 11.0.x
http://www.symantec.com/docs/TECH103087