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Why I Can’t Open Windows Defender In Windows 11 And How To Fix It?

November 2, 2022 by TechSkey

Windows Defender is the antivirus that brings the same operating system from version 8 to the current one. In addition to blocking and eliminating viruses, it protects the system from suspicious programs or pages, sometimes, it is very annoying since it gives false positives, but in the same way you can delete windows defender history very easily.

In Windows 11, many users have had problems when opening it since a message is displayed that says, “You will need a new application for this Windows Defender link” the solution is very simple. The only thing you need to do is reset this tool again and make it ready. You can use a command in PowerShell or reset it from the ‘Applications and features’ section.

An important fact that you should know is that Windows Defender receives updates through Windows Update. Therefore, it is also recommended that you verify that you do not have any pending updates or that they correct these types of errors before proceeding with a Windows security restore, as it may just need definition.

Windows Defender In Windows 11

What Is The Main Reason For Windows Defender Not Working On Your Windows 11 PC?

The main error is when a program is installed and it creates an incompatibility with this software. It is very common when installing an antivirus or a program that uses the root folder, the plugin with C + + or Net Framework. Even after uninstalling the program Windows security (Windows defender) will still not be displayed.

It is also important to know that when you install or activate an antivirus application, Microsoft Defender security will be automatically disabled. And when you uninstall the same, Windows Defender antivirus will re-enable itself. That is why it is very common that Windows Defender does not open afterward since they are related programs.

Likewise, you manually download the Windows Defender definitions. In that case, it will not be able to open and will ask for a program to open it, and of course it does not require any since it is a direct feature of the operating system.

How To Fix And Properly Open Windows Defender On Your Computer?

You don’t need to uninstall Windows Defender Security to fix the problem. Instead, resetting Windows Defender Security will do the trick, and you can do it in several ways. The most recommended are the following:

Using Windows Powershell

  • Right-click on the Windows start button and open PowerShell with administrator permissions.
  • You type the command ‘Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage’ and press Enter.
  • At the end of the process we only close the PowerShell and open the Windows security since a PC restart is not required.

Running Windows Defender as administrator

Unable to open the Windows Defender interface without an action using a direct command. That is why it is necessary to give it a function. In this case we will indicate that it performs a type 1 analysis to solve the error that it does not open. To do it you just have to:

  • Open the command prompt or CMD tool with administrator permissions.
  • We execute the command “%ProgramFiles%\Windows Defender\MpCmdRun.exe” -Scan -ScanType 1
  • When the procedure finishes we close the program and that’s it.

How Do You Know If Windows Defender Was Successfully Fixed On Your Computer?

It is very simple, you just have to proceed to open the Windows security if it opens normally, it is because the problem is solved. But it is important to know that sometimes the error is repaired and the same appears again in a while. That’s why to be sure you should restart your PC every time you correct with the command.

Rebooting your PC

Once you finish restarting the PC, we must check that it opens normally to use Windows security to protect us. Verify that everything goes well by following the path below:

  • Press the start key or click on the button.
  • Go into settings and then ‘Update and security’.
  • Open ‘Windows Security’ if you succeed it is because this tool has been repaired.

Conclusion

If you have any problems related to Windows security, do not hesitate to consult Microsoft technical support to solve any issue related to the system’s new features.

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