Symantec Endpoint Protection Manager (SEPM) is a comprehensive security management solution that provides real-time threat protection, detection, and remediation for endpoints across an organization. Version 14.3 is a robust update that offers enhanced security features, improved performance, and streamlined management.

and select the appropriate package. For a complete setup, download the Full Installation file (usually Symantec_Endpoint_Protection_14.3_Full_Installation_EN.exe Step 2: System Requirements & Preparation

If you want, I can produce a short pre-upgrade checklist tailored to your environment size (small, medium, large) or a step-by-step upgrade plan.