When Windows Defender fails to function as it is supposed to, consider using an alternative like Systweak Antivirus. If the preliminary fixes do not help, try the other fixes explained below. After that, try updating Windows Defender and enable Windows Defender to update it automatically.Īlso Read- Do You Need Antivirus for Windows 11, 10 Install all updates and reboot the system.If the update fails, from the notification area, click the shield icon > select Virus & threat protection > Check for updates. Manually check for Windows Defender Update try downloading and installing available Windows Update.If it interferes with a pre-installed security application, uninstall the third-party antivirus solution.

If you have an additional security application running, check Windows Defender to ensure it has not disabled the updates.Basic fixesīefore getting into more technicalities, try these basic steps to fix the Windows Defender update issue.

How to fix Windows Defender is unable to update? 1.

Windows defender update