Virus definition not updating
Your computer will now check for any and all available updates.
In the Win X Menu, click on Command Prompt (Admin) to open an elevated Command Prompt.
Fortunately, there are a multitude of different viable solutions for this problem, and the following are the three most effective solutions that you can use to get rid of this issue: If you have been trying to update Windows Defender from the program itself and failing because of “connectivity problems”, the most logical solution for the issue would certainly be trying to update Windows Defender using Windows Update. Right-click on the Start Menu button to open the Win X Menu.
The file should be in one of these locations: C:\Documents and Settings\All Users\Application Data\Symantec\Live Update C:\Program Data\Symantec\Live Update At the beginning of each Live Update cycle, the Live Update version will be shown.
The file is located in the SEPM folder on the installation media.
The filename is Procedure: Step 1) Check the Live Update version installed.
Click “Refresh” on the Console home page, if this is not the case.
Step 6) Proxy Settings For environments with a corporate proxy, allow HTTP port 80 or FTP ports 20, 21 and port 443 connections to these hosts: liveupdate.liveupdate.update.Note that IP address obtained by DNS resolution, should not be used, as this may be subject to change due to system updates and load balancing.