"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
    2022-07-16T12:05:47+00:00

    Thank you, this resolved the issue for me.

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  2. Ramesh 181.2K Reputation points Volunteer Moderator
    2022-07-15T14:38:36+00:00

    Hi,

    The WindowsApps folder is a highly protected (ACLs) folder, and you can't browse it via File Explorer or Command Prompt. However, you can access its subfolders (e.g., C:\Program Files\WindowsApps\Microsoft.SecHealthUI_1000.22000.1.0_neutral__8wekyb3d8bbwe) directly by typing the entire path in the Run dialog.

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  3. Ramesh 181.2K Reputation points Volunteer Moderator
    2022-07-13T18:58:20+00:00

    Hi I_Sort_Of_Know_IT,

    Do you mean you ran the command I gave in the last reply and still doesn't work? Did you get any error message when running the command in elevated PS?

    Reposting the command-line:

    Add-AppxPackage -Register -DisableDevelopmentMode "C:\Program Files\WindowsApps\Microsoft.SecHealthUI_1000.22000.1.0_neutral__8wekyb3d8bbwe\AppXManifest.xml"

    Note that it's different from the 1st command.

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  4. Anonymous
    2022-07-13T18:40:56+00:00

    Hi Ramesh,

    Sadly, I don't have access, even with my elevated credentials, to view the contents of the C:\Program Files\WindowsApps folder, but I can confirm that I am still receiving the original error when attempting to open the Windows Security dashboard: "You'll need a new app to open this windowsdefender link".

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  5. Ramesh 181.2K Reputation points Volunteer Moderator
    2022-07-13T17:52:01+00:00

    Hi,

    The package seems to be installed for one of the users (don't know which one). Can you try the following command now:

    Add-AppxPackage -Register -DisableDevelopmentMode "C:\Program Files\WindowsApps\Microsoft.SecHealthUI_1000.22000.1.0_neutral__8wekyb3d8bbwe\AppXManifest.xml"

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