You can upgrade to the newest release of the product to take advantage of new features. To install a new version of the software, you must perform certain tasks to ensure a successful upgrade. You should also check the known issues that appear in the release notes for any late-breaking information relating to upgrades.
This section is specific to upgrading the software in environments where a compatible version of the product is already installed.
Before you upgrade, review the following information:
For the most current system requirements, see: Release Notes and System Requirements for all versions of Symantec Endpoint Protection and Symantec Network Access Control
New features in this version
Compatible Symantec Endpoint Protection Manager and Symantec Endpoint Protection client upgrade paths
Symantec recommends that you do not perform third-party installations simultaneous to the upgrade of Symantec Endpoint Protection. The installation of any third-party programs that make network- or system-level changes may cause undesirable results when you upgrade Symantec Endpoint Protection. If possible, restart the client computers before you upgrade Symantec Endpoint Protection.
If you upgrade from 11.0, remove any packages that are assigned to the client groups. The Maintain existing client features when upgrading option on the 11.0 package causes the upgrade to remove all protection technologies from the clients.
For more information, see: Clients show "No Symantec protection technologies are installed" after migrating the SEPM from 11.x to 12.1
Table: Process for upgrading to the Symantec Endpoint Protection enterprise version displays the steps you need to perform to upgrade to the latest version of Symantec Endpoint Protection.
Table: Process for upgrading to the Symantec Endpoint Protection enterprise version