"You'll need a new app to open this windowsdefender link" fix

Anonymous
2022-02-09T15:04:00+00:00

Hi this post is to help people with windows 10 and 11 windows security not working

On windows 11 do this

  1. launch powershell as an admin
  2. Set-ExecutionPolicy Unrestricted
  3. Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
  4. Set-ExecutionPolicy restricted

IGNORE THE ERRORS

on windows 10 do this

  1. launch powershell as an admin}
  2. run get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
  3. if it doesn't work do this
    4) run Add-AppxPackage -Register -DisableDevelopmentMode "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml"
  4. run get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Windows for home | Windows 11 | Performance and system failures

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  1. Anonymous
    2022-07-03T05:51:28+00:00

    I was facing the same exact issue.It was working for Admin account but I was unable to launch it for secondary (Standard User) accounts. The solution described in OP did not work for me. I removed secondary account and then added it back and it worked for me.

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  2. Anonymous
    2022-06-18T15:35:31+00:00

    This did work on my Windows 10. Just ignore the errors that you may get.

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  3. Anonymous
    2022-06-17T19:53:10+00:00

    This also worked for me after everything else failed. It looks like McAfee managed to get itself installed on the machine, and when I uninstalled it, Windows Defender got broken.

    Anyway, these three powershell commands fixed it - don't be freaked out by the number of error messages that you see in the console.

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  4. Anonymous
    2022-06-17T18:00:38+00:00

    Fixed now ... downloaded Norton from BT

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  5. Anonymous
    2022-06-15T02:17:52+00:00

    Nice fix, thank you!

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