How to Reinstall Windows Defender in Windows 11

What to Know

  • You don’t need to download Windows Defender, because it’s integrated into Windows 11.
  • Enter this in a PowerShell window: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage.
  • Or, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset.

This article explains when and how to reinstall Windows Defender through the command production line or Settings app in Windows 11 .

How to Reinstall Windows Defender in Windows 11

Windows Defender ( aka, Microsoft Defender ) is n’t installed on your calculator like a typical plan, so you ca n’t reinstall it like you can regular software. alternatively, follow these directions to use a PowerShell command to get the speculate done. It might take anywhere from 5 seconds to a few minutes to complete. If you can open Settings normally, there ‘s an easier method after these steps.

  1. Right-click the Start button and blue-ribbon Windows Terminal (Admin) .
    If that does n’t work for whatever reason, use the search bar on the taskbar to search for PowerShell, and then right-click it to find the Run as administrator choice .

  2. Copy the instruction precisely as it ‘s shown hera, and then right-click in the PowerShell window to paste it ( Ctrl+V works, besides ) :

    Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
  3. Press Enter to immediately start the march to reset Windows Defender to its original settings so that it performs as a impertinently installed app .
    get appxpackage microsoft sechealthui powershell command in Windows 11

  4. You ‘ll know when it ‘s finished because you ‘ll see the blink cursor again on a new line below the instruction you entered. In the meanwhile, you might briefly see a Deployment operation progress message .
    If you see lots of red text, and an “ Access is denied ” message, return to step 1 and make certain you ‘re opening PowerShell as an administrator .

Another way to reset Windows Defender is through Settings. If Settings opens fine for you, you do n’t need to bother with a PowerShell instruction. alternatively, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset .

Reset in Windows Security options

When to Reinstall Windows Defender

technically, you ‘re not very reinstalling the program because Windows does n’t actually let you uninstall it. That said, you might run the above instruction to reset Windows Defender if it ‘s barely not working correctly .

The most obvious sign of the zodiac you need to do this is if you see an erroneousness when you try to open it. If it ‘s not opening as it should, and you see this message, the above command should fix it right away :

You'll need a new app to open this windowsdefender link
Look for an app in the Microsoft Store

Or, possibly it does open, but some of its toggles wo n’t turn on or off, or you ca n’t even find a link to it on your computer. In these cases, the PowerShell command should refresh the tool back to working order .

Windows Defender Might Just Be Off

It ‘s possible that you ‘ve considered reinstall Windows Defender because it is n’t catching malware, when in world, it ‘s merely not turned on. You might think it ‘s been uninstalled or is broken, but in truth it ‘s just disabled .

On toggle under Real time protection in Windows Security virus and threat protection settings
This is wholly possible since Windows 11 lets you turn off its built-in antivirus broadcast if you ‘d quite not use it .

Learn how to turn Windows Defender on and off for particular directions .


  • Is Windows Defender a good antivirus?

    not in truth. While window Defender provides basic protective covering from threats, it ‘s no stand-in for third-party antivirus software.

  • How do I add exceptions to Windows Defender?

    Go to Start > Settings > Privacy & Security > Windows Security > Virus & threat protection. Under Virus & Threat Protection Settings, choose Manage settings, then under Exclusions, blue-ribbon Add or remove exclusions.

source :
Category : Tech FAQ

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