windows security won't open on windows 11

dali soula 20 Reputation points
2026-07-22T00:56:11.25+00:00

hi everyone
gonna keep it short
for a while now, i have been unable to open windows security in any way.
when i open it from search bar, all i get is a blank window with windows security logo
and when i open it through the settings i just get nothing after the click
i've tried countless of solution i found online, including reinstalling windows through the recovery options ("fix problems using windows update" to be specific)
i'm open to try anything now, except for a full reinstallation through a flash drive (cuz i don't have one)

Windows for home | Windows 11 | Performance and system failures
Answer accepted by question author
Ramesh 180.3K Reputation points Volunteer Moderator
2026-07-23T18:48:01.8233333+00:00

Please do the following:

  1. Download sechealthfix_windows_11.reg and move it to the C:\ root.
  2. Download AdvancedRun from Nirsoft and run it.
  3. Using AdvancedRun, start Regedit.exe as TrustedInstaller. (see screenshot: https://ibb.co/gZgKmrR1)
  4. From the File menu in Regedit, choose Import..
  5. Dismiss the following error message dialog by clicking OK: enter image description here
  6. Browse to C:\ and import the REG file (sechealthfix_windows_11.reg) you downloaded in Step 1.
  7. Restart Windows.

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  1. Chirag Kolte 0 Reputation points
    2026-07-23T12:13:00.1733333+00:00

    Hi,

    Since you've already tried repairing Windows using Windows Update, this sounds more like the Windows Security app or its related services are corrupted rather than a simple settings issue.

    I'd recommend checking the following:

    1. Open services.msc and make sure the Security Centre service is running.
    2. Open PowerShell (Admin) and run:
    Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage

    If Reset-AppxPackage isn't available on your version of Windows, try:

    Get-AppxPackage Microsoft.SecHealthUI -AllUsers | ForEach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
    1. Run these commands in Command Prompt (Admin):
    DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
    1. If the issue persists, test in a new local Windows user account. If Windows Security opens there, the problem is likely limited to your current user profile.

    Note:-
    Hey Buddy, you must download third-party software or a batch file, or any cracked version that has a bat file to stop windows firewall therefor it coming this way

    If this command doesn't work, then the same as Windows Update also can't solve this problem

    Final solution: reinstall Windows; your problem will definitely be solved

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  2. Lester Bernard Reyes 84,695 Reputation points Independent Advisor
    2026-07-22T16:52:57.93+00:00

    Hi, thank you for replying. Since the issue persists, I suggest doing an in-place upgrade, which will upgrade the device to the latest version and repair all issues without deleting any files.

     

    Kindly follow the steps from this link:

    https://answers.microsoft.com/en-us/windows/forum/all/how-to-run-in-place-upgrade-in-windows-11/4d469147-2747-4dcb-88a4-aae9273a4500

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  3. Kapil Arya 38,236 Reputation points Volunteer Moderator
    2026-07-22T05:19:30.6266667+00:00

    Please try this command in admin Windows PowerShell:

    Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage

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  4. Lester Bernard Reyes 84,695 Reputation points Independent Advisor
    2026-07-22T04:04:16.3033333+00:00

    Hi, I'm Bernard. I'm happy to help!

    This happens when there is a corrupted file in the Windows Defender folder or a reconfiguration is needed. First, you need to check if you have a work or school account:

    Open Settings> Click Accounts> Click Access work or school, then disconnect the account there. If no account or are already disconnected, and you have the same issue, follow the steps below:

    Note: Before doing the steps, I suggest completely uninstalling the third-party antivirus first.

    Method 1. Reinstall Windows Defender

    Open the registry, then go to:

    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

    Then delete the Windows Defender folder, restart the PC, and recheck it.

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