Symantec Endpoint Protection Upgrade 14.2 To 14.3 [Extended • 2025]
Troubleshooting pointers
This is the easiest method, allowing you to configure the upgrade through the SEPM console. In the SEPM console, go to .
Upgrade the Symantec Endpoint Protection Manager (SEPM) servers first, followed by the clients.
Check the SEPM dashboard to ensure the server status displays as "Healthy."
Open the SEPM Database Backup and Restore utility from the Start menu and run a manual backup. symantec endpoint protection upgrade 14.2 to 14.3
With your planning complete, you are ready to begin. Broadcom recommends a gradual rollout strategy, starting with less critical systems, then moving to production.
Upgrading from SEP 14.2 to 14.3 is a necessary and beneficial step for any organization using Symantec’s endpoint protection. While the process requires careful planning—especially regarding the end of support for 14.2 and the end of 32‑bit OS support from 14.3 RU6 onward—the upgrade path is well‑supported and generally straightforward. By following the best practices and step‑by‑step guide outlined in this article, you can ensure a smooth transition to a more secure, feature‑rich, and fully supported endpoint protection environment.
Verify that your current 14.2 revision is supported for direct upgrade to 14.3.
With the management console running version 14.3, you can now push the updated security packages to your network endpoints. The most efficient method to achieve this is via Auto-Upgrade. Step 1: Import the Client Packages Log into your upgraded SEPM 14.3 console. Go to > Install Packages . Check the SEPM dashboard to ensure the server
The most efficient way to upgrade clients is by using the built-in Client Install Packages feature within SEPM. Log in to the SEPM console.
Follow the wizard to deploy the 14.3 package to specific machines. Post-Upgrade Steps and Verification
: Perform a full VM snapshot and use the SEPM database backup tool located in the %Symantec%...\\data\\backup folder.
Log into the SEPM console, navigate to the tab, and monitor your target groups. You should see the client version string change from 14.2.xxxx to 14.3.xxxx . A green dot on the client icon confirms successful communication and policy synchronization with the new server version. Upgrading from SEP 14
Select the containing the clients you want to upgrade. Click the Install Packages tab. Select Upgrade Group Package .
Confirm that both the SEPM server and the clients are downloading new virus and spyware definitions normally. Common Troubleshooting Tips
Extract the downloaded SEP 14.3 installation files. Right-click Setup.exe and select Run as administrator .
Make a small change to a policy and ensure it applies to the 14.3 clients. Troubleshooting Common Issues
SEP 14.3 supports newer cryptographic standards like TLS 1.2 and provides enhanced FIPS 140‑2 compliance for federal and commercial customers. It also includes smarter script scanning via the Windows AMSI interface, which can detect and block malicious PowerShell, JavaScript, and VBScript files before they execute.