C:\Windows\System32\cmd.exe /c Dism /Online /Enable-Feature /FeatureName:Windows-Defender-FeaturesĬ:\Windows\System32\cmd. When the DISM command is being used within a task sequence running PowerShell, the following path to cmd.exe is required. # For Windows Server 1803 and later, including Windows Server 20 Run the following commands: # For Windows Server 2016ĭism /Online /Enable-Feature /FeatureName:Windows-Defender-Featuresĭism /Online /Enable-Feature /FeatureName:Windows-Defenderĭism /Online /Enable-Feature /FeatureName:Windows-Defender-Gui In case the Defender feature was uninstalled/removed, you can add it back. Complete the following steps to update your antivirus definitions. Select Hide the Virus and threat protection area. Re-enable Microsoft Defender Antivirus on Windows Server if it was uninstalled Select Computer Configuration > Administrative Templates > Windows Components > Windows Security > Virus and threat protection. On Windows Server 2016, in some cases, you may need to use the Malware Protection Command-Line Utility to re-enable Microsoft Defender Antivirus.Īs a local administrator on the server, perform the following steps: ![]() If Microsoft Defender Antivirus features and installation files were previously removed from Windows Server 2016, follow the guidance in Configure a Windows Repair Source to restore the feature installation files. For more information, see Troubleshoot Microsoft Defender Antivirus while migrating from a third-party solution. Re-enable Microsoft Defender Antivirus on Windows Server if it was disabledįirst, ensure that Microsoft Defender Antivirus is not disabled either through Group Policy or registry. This script can also assist in re-enabling Microsoft Defender Antivirus. ![]() If you're preparing to install the modern, unified solution on Windows Server 2016, you can leverage the Installer help script to automate the platform update and the subsequent installation and onboarding. Alternatively, you can download the update package 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. ![]() Re-enabling Microsoft Defender Antivirus doesn't automatically install the platform update.
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