Delete the content of the Downloads folder, but not the folder itself.Update the Live Update catalog by opening the following link in Internet Explorer: Servlet?
Before you begin the download and installation process you should use the instructions provided to determine whether your computer uses 32-bit or 64-bit processing.
Important: Please be advised that CSSD recommends uninstalling any existing anti-virus software on your computer, including previous versions of Symantec Anti Virus, Before installing Symantec Endpoint Protection, you must first uninstall any existing anti-virus software on your computer, including previous versions of Symantec Anti Virus.
Note: When Symantec Endpoint Protection is installed on your computer, it is automatically configured to scan for new definitions every four hours and performs the installation of any available updates.
Please remember that updates may not be released between each four hour check.
Symptoms: Symantec Endpoint Protection Clients do not update virus definitions.
Symantec Endpoint Protection Manager shows old virus definitions in "Admin Show Live Update Downloads".
It was working fine since long, but I noticed that SEPM stopped updating Antivirus And Antispyware Protection virus definitions and they were almost 1 week old, rest of definitions including Proactive Threat Protection and Network Threat Protection were up to date.
So there was something wrong with the virus definition update engine.
Faculty and staff can also download it from the Secure Your Data portal community at My Pitt (edu).
This document explains how to download and install Symantec Endpoint Protection on a Windows-based computer, run Live Update, and run both manual and automated virus scans.
I tried to manually launch Live Update on SEPM various times, but no use, Every time update all other definitions excluding Antivirus updates.