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Windows 11 Optional September update is now available

Microsoft has released an optional update for all users of the initial Windows 11 version. This is the October Patch Day preview. As with previous updates, there are new features and improvements in addition to bug fixes. After the optional update for Windows 10, the Windows team has now also released an optional update for Windows 11.

If you want, you can get the update now and benefit from the changes. This is an update with a long list of bug fixes and improvements. The Windows team released this version for testing a few days ago, and the update is now starting for anyone who wants to try it. This non-security update includes quality improvements and launches new support for WebAuthn redirects. More on this at the end of the article in the release notes.

Improvements and bug fixes

Microsoft provides a number of bug fixes. Among other things, we fixed an issue where apps have to reinstall if the app was not downloaded from the Microsoft Store. In addition, the Windows team addresses problems with the on-screen keyboard, HDR, and with the. ##contentad alignment=/”right/”## The optional update KB5017383 is a so-called preview update or optional update. Microsoft used to group these updates under the term /”C-Updates/”.

The new version has the build number 22000.1042. Unlike the Patch Day updates, the optional updates will only be released gradually. It is therefore possible that you will not be offered it via Windows Update after the start of publication. Then a restart often helps to be able to obtain the new version via Windows Update.


This non-security update includes quality improvements. Important changes:

  • New! Introduces WebAuthn redirection. You can authenticate to apps and websites without a password when using Remote Desktop. You can then use Windows Hello or security devices such as FiDO2 (Fast Identity Online 2.0) keys.
  • New! Adds more dynamic widget content with notification badging to your taskbar. When you open the Widgets board, a banner appears at the top of the board. It contains more information about what triggered the notification signal.
  • Addresses an issue that requires you to reinstall an app if the Microsoft Store hasn’t signed that app. This problem occurs after you upgrade to a newer operating system.
  • Addresses an issue that prevents codecs from being updated from the Microsoft Store.
  • Fixes a race condition in the framework’s auto repair registration. This problem occurs because a registry key is missing.
  • Addresses an issue affecting the NPSM (Network Policy Server Management) service. This issue causes large delays when logging out.
  • Addresses an issue affecting the Windows Search service. Indexing progress is slow when using the service.
  • Addresses an issue affecting cached security key credentials and FIDO2 authentications. On devices joined to a hybrid domain, the system removes these cached credentials.
  • Addresses an issue affecting a network’s static IP address. The issue causes the static IP address configuration to be inconsistent. Because of this, NetworkAdapterConfiguration() sporadically fails.
  • Fixes a rare stop error that occurs after you change the display mode and more than one display is in use.
  • Addresses an issue affecting rendering in the Desktop Window Manager (DWM). This issue can cause your device to become unresponsive in a virtual machine setting when using certain video graphics drivers.
  • Addresses an issue affecting graphics drivers using d3d9on12.dll.
  • Addresses an issue affecting URLs generated by JavaScript: URLs. These URLs do not work as expected when you add them to the /”Favorites/” menu in IE mode.
  • Addresses an issue that forces IE mode tabs to be reloaded in a session.
  • Fixes an issue that successfully opens a browser window in IE mode to view a PDF file. Later, navigating to another website in IE mode within the same window fails.
  • Fixes an issue affecting /”window.open /” in IE mode.
  • Introduces a group policy that enables and disables Microsoft HTML Application (MSHTA) files.
  • Addresses an issue affecting the Microsoft Japanese Input Method Editor (IME). Text conversion fails when using some third-party virtual desktops.
  • Addresses an issue that occurs when the input queue overflows. This can cause an application to stop responding.
  • Addresses an issue that may cause the screen to display a black screen. This can occur when using a pen to enable HDR (high dynamic range).
  • Addresses an issue affecting the App-V client service. The service runs out of memory when you delete App-V registry nodes.
  • Addresses an issue that may change the default printer when the printer is a network printer.
  • Addresses an issue affecting Windows Defender Application Control (WDAC) path rules. This issue prevents .msi and PowerShell scripts from running.
  • Addresses an issue that may bypass MSHTML and ActiveX rules for WDAC.
  • Addresses an issue that causes WDAC to log 3091 and 3092 events in audit mode.
  • Addresses an issue affecting Windows Defender Application Control (WDAC). This prevents WDAC from logging .NET Dynamic Code Trust Verification errors.
  • Addresses an issue affecting WDAC policies. When you enable SecureLaunch on a device, the WDAC guidelines do not apply to that device.
  • Addresses an issue that occurs when a WDAC policy fails to load. The system logs this error as an error, but the system should log the error as a warning.
  • Addresses an issue affecting code integrity logging. It logs problems as errors instead of warnings. This is why the automatic repair is triggered.
  • Addresses an issue affecting the on-screen keyboard. The onscreen keyboard closes immediately when you tap to switch apps.
  • Addresses an issue that causes LogonUI.exe to stop working. Because of this, you cannot close the lock screen to view the credentials screen.
  • Addresses an issue affecting the FindNextFileNameW() function. The memory may be emptied.
  • Addresses an issue affecting Robocopy. Robocopy fails to set a file to the correct modification time when using the /IS an option.
  • Addresses an issue affecting cldflt.sys. A stop error occurs when used with Microsoft OneDrive.
  • Addresses an issue affecting the LanmanWorkstation service. If you mount a network drive, the Memory service will expire.
  • Addresses an issue affecting the /”Get-SmbServerNetworkInterface /” cmdlet. It only retrieves a subset of the available network interfaces.
  • Addresses an issue affecting the /”Get-SmbServerConfiguration /” cmdlet. You can only run them if you are an administrator.
  • Addresses an issue affecting roaming user profiles. After you sign in or sign out, some of your settings will not be restored.
  • Addresses a known issue affecting XML Paper Specification (XPS) viewers. This may prevent you from opening XPS files in some non-English languages. This includes some Japanese and Chinese character encodings. This issue affects XPS and Open XPS (OXPS) files.
  • Addresses a known issue affecting daylight saving time in Chile. This issue can affect the time and dates used for meetings, apps, tasks, services, transactions, and more.
  • Addresses an issue affecting the Hyperlink. Click event. This affects apps like Smartphone-Link and feedback-Hub that embed links in TextBlocks and RichTextBlocks.