The SEPM upgrade is an in-place upgrade. You do not need to uninstall 14.2 first.

This comprehensive guide will walk you through every aspect of the upgrade process, from understanding the benefits of moving to 14.3 to detailed step‑by‑step instructions and post‑upgrade validation. Whether you are a seasoned system administrator or managing this upgrade for the first time, this article aims to provide all the information you need for a smooth, successful transition.

Push the installation package directly to specific IP ranges or Active Directory groups.

Step 0 — Backups (do not skip)

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Step 4 — Post-SEPM-upgrade checks

This is the most efficient method for most environments. You assign the 14.3 package to specific client groups in the SEPM console, and the clients will automatically update according to your schedule .

Has anyone else recently completed this jump? Let me know in the comments how it went! 👇

The process of stopping SEPM services has a critical nuance depending on your current version:

Ensure LiveUpdate is pulling the latest virus definitions.

Check the log file located at C:\Program Files (x86)\Symantec\Symantec Endpoint Protection Manager\tomcat\logs\configuration-wizard-0.log . Ensure that the SQL Server transaction log is not full.

Open the Database Backup and Restore Wizard from the Symantec tools menu and run a full backup.

Once the core files are copied, the Upgrade Wizard will automatically launch the . Click Next on the welcome screen.

Broadcom (which now owns Symantec) is pushing heavily toward the cloud. If you are a purely "air-gapped" or on-premises purist, you may find the 14.3 interface and documentation nudging you toward cloud features you might not want.

Follow the prompts to re-configure LiveUpdate to ensure content updates continue after the upgrade.