Can t turn windows defender on windows 10 install#
In this case, try to check for new updates and install them via Settings -> Update & Security -> Windows Update -> Check for updates or use PowerShell to install the latest updates. In rare cases, Microsoft Defender Antivirus may stop working after installing monthly Windows 10 updates.
Restart Microsoft Defender and check if the problem is fixed. To do this, open a command prompt as administrator and run the following commands: Try to re-register the Windows Defender libraries. In Windand newer builds, the GPO section with Defender settings is called Microsoft Defender Antivirus. The status of the services can be checked using PowerShell:
Microsoft Defender Antivirus is automatically disabled if a third-party antivirus app is installed on your computer. Microsoft Defender Not Working Due to 3 rd Party AntivirusĬheck if you have a third-party antivirus installed on your computer that prevents Microsoft Defender from working.