Windows defender security center stops responding

Hi,
After the update to v.1709 build 16299.214, Windows defender security center, stops responding.
Dism /Online /Cleanup-image /Restorehealth and sfc /scannow without errors.
Nome dell'applicazione che ha generato l'errore: SecHealthUI.exe, versione: 10.0.16299.214, timestamp: 0x5a5fb638
Nome del modulo che ha generato l'errore: Windows.UI.Xaml.dll, versione: 10.0.16299.214, timestamp: 0xbd22870b
Codice eccezione: 0xc000027b
Offset errore 0x00000000006e80e9
ID processo che ha generato l'errore: 0x1474
Ora di avvio dell'applicazione che ha generato l'errore: 0x01d3a01e39974355
Percorso dell'applicazione che ha generato l'errore: C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\SecHealthUI.exe
Percorso del modulo che ha generato l'errore: C:\Windows\System32\Windows.UI.Xaml.dll
ID segnalazione: 148bf619-5874-44cf-954a-2c213e223b15
Nome completo pacchetto che ha generato l'errore: Microsoft.Windows.SecHealthUI_10.0.16299.15_neutral__cw5n1h2txyewy
ID applicazione relativo al pacchetto che ha generato l'errore: SecHealthUI

With the previous build there were no problems and I have no other antivirus installed.
Thank you!

Please type Powershell into Start Menu and start the Powershell as a administrator.


At the Powershell type below command and press Enter key.

Code:

Add-AppxPackage -register "C:\Program Files\WindowsApps\Microsoft.Windows.SecHealthUI_10.0.15063.0_neutral__cw5n1h2txyewy\appxmanifest.xml" -DisableDevelopmentMode

You may need to restart your computer.

File no found!!

Bree said:

The command @FreeBooter gave you was applicable to earlier versions of Windows 10. From the Creators Update, version 1703 the location has changed, the AppxManifest.xml is now to be found in:

"C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppxManifest.xml"

The following command in Powershell (admin) should work.

Code:

Add-AppxPackage -register "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppxManifest.xml" -DisableDevelopmentMode

Thanks @Bree!

Bree said:

I see @alpha45 has marked this thread Solved. Does that mean Defender now works properly for you?

Yes, defender works properly
Thank you

We are glad to hear your issue has been resolved, thank you for letting us know that all is now well!