How to fix Windows Security blank white window UI?

Question

How to fix Windows Security blank white window UI?

ACW 20

When I try to open windows security the UI is a blank white screen, attached screenshot. Screenshot 2026-09-15 205734

System Notes:

Running Windows 11, no missing updates
Architecture x64, Intel
There are two numbered folders from 2025 and a SecuirtyHealthSetup.exe in my C:\Windows\System32\SecurityHealth instead of one folder.

SOLUTIONS I HAVE ALREADY TRIED ANScreenshot 2026-09-15 205734.pngD NOT HELPED:

Settings/Apps/Windows Security/ Advanced - Repair and Reset
Tried to run my Security Health Setup.exe as administrator from command prompt
Run DISM.exe /Online /Cleanup-image /RestoreHealth then sfc /scannow
Restore was completed and no integrity violations were found.
Manually download the Windows Security App Update and run as admin from the downloads.
Tried this in poweshell
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

When I tried to run the SecurityHealth installer no new files are made anywhere so I'm not sure its functioning properly since it's supposed to run in the background?

I am really hoping I don't have to do a system reset while keeping files. Can someone please help?

0 comments

Answer accepted by question author

_AW_ 69,416 Volunteer Moderator

Thanks for the screenshot. The problem you have is that in the folder C:\Windows\System32\SecurityHealth\10.0.27777.1008-0, SecurityHealthHost.exe is corrupt. As a result, the SecurityHealthService isn't running, so trying to install SecurityHealthSetup.exe will fail.

The solution is to delete the folder C:\Windows\System32\SecurityHealth\10.0.27777.1008-0 then reboot the computer.

The easiest method is to use IObit Unlocker.

https://www.iobit.com/en/iobit-unlocker.php

After installation, right click on C:\Windows\System32\SecurityHealth\10.0.27777.1008-0 and select IObit Unlocker.

In the resulting dialog window, click the drop arrow next to the Unlock button and select Unlock & Delete.
Reboot the computer.

The Windows Security UI should now open and SecurityHealthService should also be running, in which case you can run Windows Update to get the latest SecurityHealth build.

You can also download it from https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/defu/2026/07/securityhealthsetup_660338b236d35588cb1e6c4db2021ed679653c01.exe Right click and run as administrator to install.

ACW 20 Reputation points

2026-09-20T11:28:50.28+00:00

Thank you so, so, so much. I have tried so many different solutions online from various similar or the same problem threads. I've had this issue for over a week and its resolved now, you are my hero. May both sides of your pillow be cool every night!!!
_AW_ 69,416 Reputation points Volunteer Moderator

2026-09-20T11:30:53.6933333+00:00

Haha thanks. You're most welcome.

4 additional answers

Your answer

ACW 20 Reputation points

2026-09-20T11:28:50.28+00:00

Thank you so, so, so much. I have tried so many different solutions online from various similar or the same problem threads. I've had this issue for over a week and its resolved now, you are my hero. May both sides of your pillow be cool every night!!!
_AW_ 69,416 Reputation points Volunteer Moderator

2026-09-20T11:30:53.6933333+00:00

Haha thanks. You're most welcome.

Answer 1

_AW_ 69,416 Volunteer Moderator

Open Windows PowerShell and copy/paste/run the following commands:

gci 'C:\Windows\System32\SecurityHealth'-recurse -file -Include '*.dll', '*.exe', '*.appx'  | Get-AuthenticodeSignature | ft -auto Path, Status

gsv SecurityHealthService, WdBoot, WdFilter, WdNisDrv, WinDefend, wscsvc, wuauserv | ft -auto Name, DisplayName, StartType, Status

Post a screenshot of the output.

ACW 20 Reputation points

2026-09-20T07:35:46.3233333+00:00

Answer 2

Kapil Arya 38,471 Volunteer Moderator

Pls run this command in admin Windows PowerShell:

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

Hope this helps!

ACW 20 Reputation points

2026-09-20T06:00:05.94+00:00

This didn't fix it, I have already tried this

Answer 3

David-M 126.2K Independent Advisor

Hi. I'm David, and I'm happy to help you.

To be able to assist you better, please clarify the following:

Do you have, or have you ever had, a third-party antivirus installed? If yes, which one?

Also. What is the current "OS Build" of your Windows 1x?

Press "Windows + R", type winver, and click OK.

If you prefer, share a screenshot. Use the shortcut "Windows + Shift + S" to use the screenshot tool.

Be sure to censor your email address if it appears. The Microsoft Q&A is public.

Looking forward to your reply.

ACW 20 Reputation points

2026-09-20T05:58:10.95+00:00

No third-party.
OS 26200.9457

Answer 4

Since Repair/Reset, the Windows Security app update installer, DISM, SFC, and re-registering Microsoft.SecHealthUI have already been tried, the supported next step is a repair installation (in-place upgrade) of Windows 11.

This matches the accepted resolution in similar Windows Security blank-window cases when the UI remains white/blank after app repair and system file checks.

Steps:

Go to the Windows 11 software download page.
Under Create Windows 11 Installation Media, select Download Now.
Run mediacreationtool.exe.
When prompted for media type, select ISO file.
After the ISO is downloaded, mount it by double-clicking it or right-clicking it and selecting Mount.
Open the mounted ISO and run setup.exe.
Follow the prompts.
At the Ready to install screen, make sure Keep personal files and apps is selected.

Important:

If Keep personal files and apps is greyed out, stop the installation and do not continue.
This is different from Reset this PC. A repair installation is intended to repair Windows components while keeping apps and personal files.

About SecurityHealthSetup.exe: the documented installer runs in the background and must be run as administrator. On Windows 11, the update applies only to supported builds, and the current Windows Security app version can be checked with:

Get-AppPackage Microsoft.SecHealthUI

If the installer did not resolve the blank UI and DISM/SFC found no repairable corruption, the in-place repair path is the supported next action from the available guidance.