How to Fix Windows Defender not working Windows 11 [Steps]

What is ‘Windows Defender not working’ issue in Windows 11?

If you are experiencing Windows Defender not working Windows 11 and looking for ways to fix, then you are in right-place for solution. Here, you are provided with easy ways to fix the issue. Let’s starts the discussion.

‘Windows Defender not working’ issue Windows 11:

‘Windows Defender’: Windows Defender antivirus or Windows Defender is antimalware component of Microsoft Windows. Prior to Windows 10, Windows Defender was a graphical desktop app. Starting with Windows 10 and Windows Server 2016, users manage the Windows Defender antivirus indirectly through either the Windows Security app or PowerShell. It is part of broader Microsoft Defender for Endpoint offering.

However, several users reported they faced Windows Defender not working Windows 11 when they tried to launch and use Windows Defender in Windows 11 computer. This issue indicates you are unable to access and use Windows Defender in Windows computer for some reasons. There could be several reasons behind the issue including corruption in system files or registry, outdated Windows OS, corruption in Windows computer, and other issues.

Another possible reason behind the issue with Security Center service, incorrect system date & time, interference of third-party antivirus/firewall program installed in computer, and other issues. It is possible to fix the issue with our instructions. Let’s go for the solution.

How to fix Windows Defender not working Windows 11?

Method 1: Fix Windows Defender not working issue with ‘PC Repair Tool’

‘PC Repair Tool’ is easy & quick way to find and fix BSOD errors, DLL errors, EXE errors, problems with programs/applications, malware or viruses infections in computer, system files or registry issues, and other system issues with just few clicks.

⇓ Get PC Repair Tool

Method 2: Run SFC scan

You can run SFC scan in computer to repair corruption in system files and fix the issue as well.

Step 1: Type ‘cmd’ in Windows Search Box and press ‘SHIFT + ENTER’ keys on keyboard to open ‘Command Prompt as Administrator’

Step 2: Type ‘sfc /scannow’ command and hit ‘Enter’ key to execute. Once executed, restart your computer and check if the issue is resolved.

Method 3: Set system date & time correctly

Step 1: Open ‘Settings’ app in Windows PC and go to ‘Time & Language > Date & Time’

Step 2: Click ‘Change’ to set the correct time and date

Method 4: Restart Security Center Service

Step 1: Open ‘Services’ app in Windows PC via Windows Search Box

Step 2: Find and right-click on ‘Security Center’ service, and select ‘Restart’ to restart the service

Step 3: Repeat the same steps for following services and check if the service is running properly

Windows Defender Advanced Threat Protection

Windows Defender Firewall

Windows Defender Antivirus Network Inspection Service

Windows Defender Antivirus Service

Step 4: Double-click on the each service mentioned above, to open its Properties. Select ‘Automatic’ from ‘Startup Type’ dropdown, and hit ‘Start’ button under ‘Service Status’ section, and then hit ‘Apply > Ok’ button to save the changes. Once done, restart your computer and check if the issue is resolved.

Method 5: Update Windows 11 OS

Updating Windows 11 OS to latest version can resolve the issue.

Step 1: Open ‘Settings’ app in Windows PC and go to ‘Windows Update’ and click ‘Check for updates’ button

Step 2: Download and install all available updates in computer and once updated, restart your computer and check if the issue is resolved.

Method 6: Disable or uninstall third-party antivirus/firewall

This issue can be occurred due to interference of third-party antivirus/firewall program installed in computer. You can disable or uninstall third-party antivirus software in computer in order to fix the issue and once disabled/uninstalled, check if the issue is resolved.

Method 7: Perform Clean Boot operation

You can run Clean Boot in computer in order to fix the issue.

Step 1: Open ‘System Configuration’ app in Windows PC via Windows Search Box

Step 2: Click ‘Services’ tab, tick ‘Hide all Microsoft Services’ checkbox and hit ‘Disable All’ button

Step 3: Now, click ‘Startup’ tab, and click ‘Open Task Manager’ link, right-click on each startup item and select ‘Disable’ to disable them and then close Task Manager

Step 4: Finally, click ‘Apply > Ok’ button on System Configuration app to save the changes and once done, restart your computer and check if the issue is resolved.

Method 8: Fix Windows Defender not working issue using Registry Editor?

Step 1: Open ‘Registry Editor’ app in Windows PC via Windows Search Box and go to following path

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

Step 2: Find DisableAntiSpyware value in right pane. If it is not there, right-click on empty space in right-pane and select ‘New > DWORD (32-bit) value’, name the value to ‘DisableAntiSpyware’. Double-click on it to edit, set its value data to ‘0’, and then hit ‘Ok’ button to save the changes

Step 3: Once done, restart your computer and check if the issue is resolved.

Method 9: Repair or Reset Windows Security Windows 11

Another way to fix the issue is to repair or reset Windows Security Windows 11.

Step 1: Open ‘Settings’ app in Windows PC via Windows Search Boxes and go to ‘Apps > Apps & Features’

Step 2: Find and select ‘Windows Security’, click ‘Three-dot’ menu next to it and click ‘Advanced Options’

Step 3: Click ‘Repair’ and confirm repairing to repair Windows Security. Or click ‘Reset’ and confirm resetting to perform Windows Security reset operation and then check if the issue is resolved.

Method 10: Reset Windows 11

If the problem is still persist, you can try to fix the issue by resetting Windows 11 OS in computer.

Step 1: Open ‘Settings’ app in Windows PC via Windows Search Box and go to ‘System > Recovery > Recovery Options and Reset This PC’ and click ‘Get Started’

Step 2: Follow on-screen instructions to finish resetting and once finished, check if the issue is resolved.

Conclusion

I am sure this article helped you on How to fix Windows Defender not working Windows 11 with easy ways. You can read & follow our instructions to do so. That’s all. For any suggestions or queries, please write on comment box below.

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