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

Alternatively, download the update package manually from the Microsoft Update Catalog or from the Antimalware and cyber security portal.

You can download and install the latest platform version using Windows Update. Verify the status of the Windows Defender services: On Windows Server 2016, verify that Microsoft Defender Antivirus is installed, is active and up to date.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it to remain uninstalled, you need to uninstall it after each major upgrade of ENS.ENS content is more than three days out-of-date.WAC enables Windows Defender if the criteria below are met:.To correct the issue, ENS 10.6.1/10.7.0 July 2020 Update and later allow Windows Security Center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.

Microsoft antimalware