Please find the Symantec Endpoint Protection 12.1 RU1 Client-only patches for Symantec Endpoint Protection 12.1 in the Attachments section.
Release Date: November 17, 2011
Description: This .zip file contains patches to upgrade Symantec Endpoint Protection 12.1 32-bit and 64-bit clients to version 12.1 RU1 (12.1.1000).
NOTE: This patch only upgrades clients. If you need to upgrade your Symantec Endpoint Protection Manager to 12.1 RU1, you must download the complete update from File Connect. Once you have upgraded the manager to 12.1 RU1, you can also upgrade clients using the auto-upgrade mechanism built into the Manager Console.