How to manually update the antivirus signatures for Symantec Endpoint Protection for Windows XP Embedded 5.1?
By default the Symantec Policy Manager (SPM) will download the definitions from liveupdate.symantec.com - if this should not be possible for any reason, the SPM can be configured to download contents from an alternative source.
To manually download the XP Embedded antivirus definitions for SEP 5.1 follow these steps.
Starting with 5.1.9 MP5, the AV engine on the agent was updated - newer clients use V5 AV engine definitions and older use V4 (in an environment with a mix of old and new clients there may be a need to download both sets).
The URL and batch scripts required to download the V5 definitions are listed below: