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JianYu's avatar
JianYu
Brass Contributor
Sep 02, 2021
Solved

Windows 11's Windows Security App can't open.

Alright guys, just now I'm trying to disable the Windows defender but I found out that I can't even open the Windows Security App. Anyone knows what's going on? Any solution? I'm looking for help. :smile:

  • Little_Joe's avatar
    Little_Joe
    Sep 02, 2021

    JianYu 


    Hello,

    Suggest try the following steps:

    • Open PowerShell by using Administrator rights
    • Copy and paste Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage to the PowerShell window and press enter
    • Close the PowerShell and retry

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  • dini0088's avatar
    dini0088
    Copper Contributor
    Jul 21, 2022

    JianYu it not worked,it show  YOU'LL NEED A NEW APP TO OPEN THIS WINDOW DEFENDER LINK,i don't know how to do it..i used many method and it do't worked..sorry for my bad english

  • Em_xD's avatar
    Em_xD
    Copper Contributor
    Jun 08, 2022
    Thank you so much! I have been trying to find ways to fix this for two days now.
  • Pcdj64's avatar
    Pcdj64
    Copper Contributor
    May 27, 2022

    JianYu 

     

     

    MAKE SURE YOU RUN POWERSHELL AS ADMINISTRATOR!

    If you don't right click and select run as administrator, it will say access denied.

  • DtRet2021_65's avatar
    DtRet2021_65
    Copper Contributor
    May 01, 2022

    JianYu I have windows 11S and it will not allow administrator mode . I like windows 11 S mode so far and do not want to switch off but I do need access to windows security. Can you help?

    • DtRet2021_65's avatar
      DtRet2021_65
      Copper Contributor
      May 01, 2022
      Little_Joe I have windows 11S and it will not allow administrator mode . I like windows 11 S mode so far and do not want to switch off but I do need access to windows security. Can you help?
      • Little_Joe's avatar
        Little_Joe
        Bronze Contributor
        May 02, 2022
        Can u pls try to open CMD with admin rights? If yes then you can still launch Powershell.
  • perfectly365's avatar
    perfectly365
    Copper Contributor
    Apr 11, 2022

    JianYu 

    i have tried this did not work, looks like my mother board is to old 2014 and don't have tpm 2.0 so can't load it and cant find it. they bypassed it, to load windows 11 on my computer. any suggestions.

    i have avast on my comp for now.

  • karthikshaindia's avatar
    karthikshaindia
    Copper Contributor
    Dec 22, 2021

    JianYu this solution doesn't work for me

    tried other solutions like https://www.thewindowsclub.com/windows-security-not-opening-or-working

     

    except for only reinstallation on my side. Do you have any other solution? I bit doubtful windows defender then install 3rd party  internet security ie, Kaspersky

     

    • nastehy's avatar
      nastehy
      Copper Contributor
      Jun 12, 2023
      resetting the app worked for me
    • CheekyCactus's avatar
      CheekyCactus
      Copper Contributor
      May 30, 2022

      karthikshaindia 

       

      Thank you,

       

      I checked out your link "https://www.thewindowsclub.com/windows-security-not-opening-or-working"

       

      I did the first option "Reinstall using PowerShell Command" and it looked a little scary, but this method worked for me and fixed it... 

       

      Set-ExecutionPolicy Unrestricted
      Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

       

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