"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
    2022-05-06T01:37:09+00:00

    thank you fixed me right up

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  2. Anonymous
    2022-05-10T01:03:51+00:00

    like a magic dude...great :)

    thx

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  3. Anonymous
    2022-05-10T02:04:24+00:00

    This is the exact problem I'm having. My main admin account is fine, never had a single issue.

    My secondary accounts (wife and child sub accounts with no admin access) have the same problem. There's an exclamation point on the Windows Security shield stating that Action needs addressed. I can't get rid of it. I can't open Microsoft Security. Everything is patched / up to date, but I'm unable to run scans.

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  4. Anonymous
    2022-05-11T03:00:36+00:00

    Thank you, no idea why it bugged for me, but this fixed it right away!

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  5. Anonymous
    2022-05-11T12:56:12+00:00

    Can anyone confirm that this fixes secondary accounts (non-admin)? I'm having no luck getting it fixed. The funny part is, after yesterday's updates for Win 11, the orange notification has turned green again, but it still gives the same message that WindowsDefender is missing.

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    2 people found this answer helpful.
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