Windows 10 V1909: Preview Update KB5005103 (August 26, 2021)

Windows[German]Microsoft has released an optional cumulative (preview) update KB5005103 for Windows 10 version 1909 (Enterprise, Education, IoT) as of August 26. The update fixes various issues with OneDrive and with the Movie and TV apps. Here is an overview of this update.


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The information can be found in the Windows 10 update history page. It should be noted that these updates are so-called preview updates. These are optional and must be manually triggered for download and installation by default.

Microsoft has announced in passing that there will be no more optional, non-security update releases (known as "C" releases) for Windows 10, version 1909, starting in October 2021.  Only cumulative monthly security updates (known as "B-Week" updates ) will continue to be available for Windows 10, version 1909.

Update KB5005103 for Windows 10 V1909

Cumulative (preview) update KB5005103 for Windows 10 Version 1909 (Enterprise, Education, IoT) raises the build to 18363.1766. The update includes a number of bug fixes, but no new operating system features and no security fixes. Here's the list of changes described as highlights:

  • Updates an issue that prevents the Windows Movies and TV app from playing some videos (.mp4 files).
  • Updates an issue that resets syncing for Microsoft OneDrive to "Known folders only" after you install a Windows update.

Below is the full list of fixed bugs and changes.

  • Addresses an issue that prevents users from tracking Distributed Component Object Model (DCOM) activation failures.
  • Addresses a threading issue that might cause the Windows Remote Management (WinRM) service to stop working when it is under a high load.
  • Addresses an issue that causes the Windows Management Instrumentation (WMI) provider host process to stop working. This occurs because of an unhandled access violation that occurs when using the Desired State Configuration (DSC).
  • Addresses an issue that causes file migration between Distributed File System (DFS) paths that are stored on different volumes to fail. This issue occurs when you implement the migration using PowerShell scripts that use the Move-Item command.
  • Addresses an issue that prevents you from writing to a WMI repository after a low memory condition occurs.
  • Addresses an issue that might prevent you from minimizing an application that uses unthemed windows.
  • Addresses an issue that prevents the Windows Movies and TV app from playing .mp4 media files that contain Pixel Aspect Ration (PAR) information.
  • Addresses an issue that causes Authentication Mechanism Assurance (AMA) to stop working. This issue occurs when you migrate to Windows Server 2016 (or newer versions of Windows) and when using AMA in conjunction with certificates from Windows Hello for Business.
  • Addresses an issue that prevents Secure Launch from working on some devices.
  • Addresses an issue that prevents Code Integrity rules from working correctly when specifying Package Family Name rules in a Code Integrity policy. This issue occurs because of the incorrect handling of case-sensitive names.
  • Addresses an issue that prevents the ShellHWDetection service from starting on a Privileged Access Workstation (PAW) device and prevents you from managing BitLocker drive encryption.
  • Addresses an issue in Windows Defender Exploit Protection that prevents some Microsoft Office applications from working on machines that have certain processors.
  • Addresses an issue that causes the Input Method Editor (IME) toolbar to appear even when the Remote App is closed.
  • Addresses an issue with a critical exception that the Open File dialog fails to handle. As a result, a Microsoft Foundation Class (MFC) application unexpectedly closes.
  • Addresses an issue that might occur when you configure the policy, "Delete user profiles older than a specified number of days on system restart". If a user has been signed in for longer than the time specified in the policy, the device might unexpectedly delete profiles at startup.
  • Addresses an issue with the Microsoft OneDrive sync setting "Always keep on this device". The setting is unexpectedly reset to "Known folders only" after you install a Windows update.
  • Addresses an issue that might create duplicate built-in local accounts, such as administrator or guest account, during an in-place upgrade. This issue occurs if you previously renamed those accounts. As a result, the Local Users and Groups MMC snap-in (lusrmgr.msc) appears blank with no accounts after the upgrade. This update removes the duplicate accounts from the local Security Account Manager (SAM) database on the affected machines. If the system detected and removed duplicate accounts, it logs a Directory-Services-SAM event, with ID 16986, in the System event log.
  • Increases the default number of entries in the local security authority (LSA) Lookup Cache to improve lookup performance in high lookup volume scenarios.
  • Addresses stop error 0x1E in srv2!Smb2CheckAndInvalidateCCFFile.
  • Addresses an issue that might cause a system to stop working after a deduplication filter detects damage in a reparse point. This issue occurs because of deduplication driver changes introduced in a previous update.
  • Addresses an issue with using the robocopy command with the backup option (/B) to fix data loss. This issue occurs when the source location contains tiered Azure File Sync files or tiered Cloud Files.
  • Stops running queries against OneSettings APIs from the obsolete Storage Health feature.

The update is optional and is only offered when the user explicitly checks for updates in the settings page. The update can also be downloaded and installed from the Microsoft Update Catalog. It is not available in WSUS or Windows Update for Business. The current SSU is already included in the cumulative update package. However, it is required that SSU update KB5004748, dated July 13, 2021, is installed before the preview update is installed.Microsoft lists no known issues with this update. 

Additionally, Microsoft has made direct improvements to the Update Client for Windows 10 to improve its reliability. If in doubt, more details can be found in the support article. It also explains how to uninstall the LCU with the SSU.


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1 Response to Windows 10 V1909: Preview Update KB5005103 (August 26, 2021)

  1. EP says:

    KB5005103 is the first cumulative update for 1909 to include a new integrated servicing stack update [SSU], guenni
    I checked the MSU downloads for KB5005103 and the updated SSU cab files are included

    that's why MS posted this statement in MS support article 5005103:

    "Microsoft now combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU)."

    MS also did the same for KB5005102 for Win10 v1809 LTSC 2019

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