Defender AV - Updates

Hi karthik palani

in your first attached image some errors indicates that the test connection to the Microsoft Defender Antivirus cloud service failed and specifically mentions an issue with establishing a connection to MAPS (Microsoft Active Protection Service). Here are some steps you can take to troubleshoot and resolve this error:

Check Network Connectivity: Ensure that the affected machine has a stable internet connection. Verify that there are no network issues, such as restrictions, firewalls, or proxy servers blocking the connection to the Microsoft Defender Antivirus cloud service. Make sure the necessary ports and protocols are open.

Validate Proxy Settings: If your organization uses a proxy server, ensure that the proxy settings are correctly configured for the machine experiencing the error. Check if the proxy is correctly configured and allowing connections to the Microsoft Defender Antivirus cloud service and MAPS servers.

Verify DNS Resolution: Confirm that the DNS resolution on the machine is working correctly. Incorrect DNS settings can lead to connection failures. Ensure that the DNS server settings are configured properly or consider using alternative DNS servers.

Temporarily Disable Other Security Software: If there are other security applications or antivirus software running on the machine, temporarily disable them to check if they are interfering with the connection to the Microsoft Defender Antivirus cloud service. Some security software may conflict with each other, causing connectivity issues.

Check for Updates: Make sure that the machine has the latest updates installed for Microsoft Defender Antivirus. Outdated versions may have compatibility issues that can cause connection failures. Check for updates and install any available patches or updates for Defender Antivirus.

Restart the Machine: Sometimes, a simple restart can resolve temporary glitches or issues with the connection. Restart the affected machine and check if the error persists.

1. Contact Microsoft Support: If the issue persists after trying the above steps.

and for the error in your second image, you can try:

Check Internet Connectivity: Ensure that the affected machine has a stable internet connection. Verify that there are no network issues, such as restrictions, firewalls, or proxy servers blocking the connection to the Microsoft update servers. You can try accessing other websites or performing a speed test to confirm the internet connectivity.

Restart the Machine: Sometimes, a simple restart can resolve temporary glitches or issues with the update process. Restart the affected machine and try updating Microsoft Defender Antivirus again.

Disable Proxy Settings: If your organization uses a proxy server, temporarily disable the proxy settings on the machine. Open the Internet Options settings, go to the Connections tab, click on LAN settings, and uncheck the box for "Use a proxy server for your LAN." Then try updating Microsoft Defender Antivirus to see if the error persists.

Temporarily Disable Other Security Software: If there are other security applications or antivirus software running on the machine, temporarily disable them. Conflicts between different security software can cause issues with updating Microsoft Defender Antivirus. Disable any third-party security applications and try updating again.

1. Clear Update Cache: Sometimes, corrupted update files in the cache can cause update failures. You can clear the Windows Update cache to resolve this. Open the Command Prompt as an administrator and run the following commands one by one:

net stop wuauserv
net stop bits
net stop cryptSvc
net stop msiserver
Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
Ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start bits
net start cryptSvc
net start msiserver

After running these commands, try updating Microsoft Defender Antivirus again.

6-Run Windows Update Troubleshooter: Windows has a built-in troubleshooter that can help identify and fix common update-related issues. Open the Settings app, go to Update & Security, select Troubleshoot from the left pane, and run the Windows Update troubleshooter. Follow the on-screen instructions and apply any suggested fixes.

7-Manually Download and Install Updates: If the automatic update process fails, you can try manually downloading the latest protection definition updates from the Microsoft Security Update Guide website (https://www.catalog.update.microsoft.com/Home.aspx). Search for the specific updates related to Microsoft Defender Antivirus, download them, and manually install them on the affected machine.

8-Contact Microsoft Support: If the issue persists after trying the above steps, it is recommended to reach out to Microsoft Support for further assistance. They can provide more specific guidance and help troubleshoot the issue with updating Microsoft Defender Antivirus.