dlp agent support for window 8 operating system or not?
Not currently. Planned for in the 12.5 release. See here
https://www-secure.symantec.com/connect/forums/windows-8-support
Window 8 is not supported yet. No officially announce for release but may be come at end of 2013 year or in next start year.
Check the idea
https://www-secure.symantec.com/connect/ideas/data-loss-prevention-vontu-windows8
Officially not yet anounced about support of Windows 8 but will come soon in coming version of DLP.
Please see below
www.symantec.com/connect/node/2547891