hello,
Try this..
To configure a LiveUpdate Content policy
- In the "Overview" pane, in the "Policy name" box, accept or change the "Policy name" and "Description."
- In the "LiveUpdate Content" pane, click Security Definitions.
- In the "Security Definitions" pane, check the updates to download and install, and uncheck the updates to disallow.
- For each update type, do one of the following actions:
- To always get the most recent updates, check Use latest available.
- To control which version of the updates clients receive, check Select a revision.
http://www.symantec.com/business/support/index?page=content&id=TECH102467
you can check for this site
http://www.symantec.com/security_response/definitions.jsp