Press Ctrl+Alt+Del, and then select Task Manager.

Verify the status of the Windows Defender services: This means no critical security updates are made to the operating system or to its built-in Microsoft Security.

Open the Control Panel and verify the status of Windows Defender.

To verify whether Windows Defender is disabled on Windows 10 or 11 after you install ENS, perform the steps below:

The uninstall of ENS triggers the action to reinstall Windows Defender. When you perform a major upgrade (for example, ENS 10.6.x to 10.7.x), ENS uninstalls the old ENS version. If you intentionally uninstalled Windows Defender and want it to remain uninstalled, you need to uninstall it after each major upgrade of ENS.ENS content is more than three days out-of-date.WAC enables Windows Defender if the criteria below are met:.To correct the issue, ENS 10.6.1/10.7.0 July 2020 Update and later allow Windows Security Center more time to load before it tries to register with Windows Security Center. Windows Defender can report as enabled at the same time as ENS if the Windows Security Center service takes too long to load.

On an ENS uninstall, Windows Defender is re-enabled. When WAC sees that ENS Threat Prevention is installed, it disables Windows Defender. ENS integrates with Windows Action Center (WAC). Windows 10/11 ENS honor the Windows antimalware agreement to not uninstall Windows Defender.

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