Solved What causing defender to display this message ?

William654 · Dec 22, 2023

Hi

Every start of windows 11 I get this message and when I click on it or view protection history it is always empty. How I know the reason of this message ?

zebal · Dec 22, 2023

Open computer management (compmgmt.msc) as Administrator and expand event viewer then navigate to:
Applications and services logs -> Microsoft -> Windows -> Windows Defender -> operational

Here search for time when you booted your system and around this time click each entry until you find one matching your screenshot.
The event should tell you which program was blocked or detected.

FreeBooter · Dec 22, 2023

Protect your PC from potentially unwanted applications - Microsoft Support

With reputation-based protection Windows users can be better protected from potentially unwanted apps (PUA).

support.microsoft.com

William654 · Dec 22, 2023

zebal said:
Open computer management (compmgmt.msc) as Administrator and expand event viewer then navigate to:
Applications and services logs -> Microsoft -> Windows -> Windows Defender -> operational

Here search for time when you booted your system and around this time click each entry until you find one matching your screenshot.
The event should tell you which program was blocked or detected.

Thanks I found what I want. What a way to see simple info like that.

zebal · Dec 22, 2023

William654 said:
Thanks I found what I want. What a way to see simple info like that.

Glad to hear it helped!
Same applies to windows firewall, there is event group for it named "Windows firewall with advanced security" just below Windows defender folder.
You can add both to "Custom Views" for easy access to monitor your system.