Symantec Endpoint Protection 14.3.3580.1100 Fre... May 2026

This release (14.3 RU1 and its patches) introduced several enhancements to detection and management:

Includes extensions for Google Chrome and Microsoft Edge to block malicious sites and redirect traffic for better protection. Symantec Endpoint Protection 14.3.3580.1100 Fre...

Install the Symantec Endpoint Protection Manager (SEPM) first. This release (14

Windows, macOS, and Linux. Note that starting with 14.3 RU6, 32-bit Windows operating systems are no longer supported. Key Features and Improvements Symantec Endpoint Protection 14.3.3580.1100 Fre...

14.3 RU1 MP1 (Release Update 1, Maintenance Patch 1). Build Number: 14.3.3580.1100.

Use the Client Deployment Wizard to create and export installation packages for your endpoints. Important Notes

Improved behavioral detection and prevention specifically targeting ransomware families like Ryuk and Netwalker.