How to Determine if Microsoft Defender Endpoint (Windows Security) is Operating on Your PC
Step 1:
Click the “Show Hidden Items” in the Systray in the bottom right of Windows 10/11
Click the Microsoft Defender Icon to open the Windows Security (Defender ATP) application.
Step 2:
Click "Open" to open the Windows Security (Defender ATP) application.
Step 3:
Click Virus & Threat Protection from the left-side menu.
Step 4:
Click Manage settings under Virus & threat protection settings.
Step 5:
If the text says “This setting is managed by your administrator,” Windows Defender ATP is operating on your system.