Forum Discussion
"Turn on Virus Protection" Notification appears after the latest update
This is a known issue reported widely in forums. It might be caused by July Cumulative Update Preview or August Cumulative Updates. We may expect a fix from September Cumulative Updates.
UPDATE (18/09/2026): This issue has been resolved by Microsoft. If you're affected, pls install or update the Microsoft Defender Antivirus update (version 4.18.26080.4) update:
https://learn.microsoft.com/en-us/windows/release-health/resolved-issues-windows-11-25H2#august-2026
You can also refer detailed fix here:
https://www.kapilarya.com/turn-on-virus-protection-keeps-popping-up-in-windows-11
Hope this helps!
Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.
A few minuets after I log-On I get a notification showing a pop-up asking me to turn on virus protection.