Windows 10 V1909: Preview Update KB5004293 (July 29, 2021)

Windows[German]In addition to the preview update for Windows 10 version 2004 – 21H1 (see Windows 10 2004-21H1: Preview Update KB5004296 (July 29, 2021)) Microsoft also released an optional cumulative (preview) update KB5004293 for Windows 10 version 1909 (Enterprise, Education, IoT) on July 29, 2021. The update fixes several gaming issues as well as many other bugs. 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 or preview updates. These are optional and must be manually triggered for download and installation by default. 

Update KB5004293 for Windows 10 V1909

Cumulative (Preview) Update KB5004293 for Windows 10 Version 1909 (Enterprise, Education, IoT) raises the build to 18363.1714. The update includes a number of bug fixes, but no new operating system features and no security fixes. Here is the list of what are considered highlights changes:

  • Updates an issue that prevents gaming services from opening certain games for desktop users.
  • Updates an issue that prevents power plans and Game Mode from working as expected. This results in lower frame rates and reduced performance while gaming.
  • Updates an issue that causes File Explorer to stop working after reaching 99% completion when you are deleting many files on a mapped network drive. 
  • Updates an issue that fails to detect that you are connected to the internet after you connect to a virtual private network (VPN).

The fixes for problems such as starting games, Explorer and Internet problems are worth highlighting. Below is the full list of fixed bugs and changes.

  • Addresses an issue that prevents gaming services from opening certain games for desktop users.

  • Addresses an issue that prevents power plans and Game Mode from working as expected. This results in lower frame rates and reduced performance while gaming.


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  • Addresses an issue that causes File Explorer to stop working after reaching 99% completion when you are deleting many files on a mapped network drive.

  • Addresses a timing issue in the Group Policy Registry Telemetry that causes Group Policy extension processing to fail.

  • Addresses an issue that repeatedly rebuilds the Windows Filtering Platform (WFP) filters. This issue occurs when a device is enrolled in a mobile device management (MDM) service and “MDMWinsOverGP” is set.

  • Addresses an issue with an MDM service that fails to correctly apply certain junk mail rules.

  • Addresses an issue that causes the enrollment of the Elliptic Curve Digital Signature Algorithm (ECDSA) certificate to fail with the error, “0x80090027 NTE_INVALID_PARAMETER”. This issue occurs when the Trusted Platform Module (TPM) provider (the Microsoft Software Key Storage Provider) stores the key.

  • Addresses an issue with auditing events 4624 and 5142 that display the wrong event template when Dutch is the display language.

  • Addresses an issue that causes System Integrity to leak memory.

  • Addresses an issue in which the Network Connectivity Status Indicator (NCSI) fails to detect internet connectivity after you connect to a virtual private network (VPN).

  • Addresses an issue with the App Readiness service that prevents users from signing in successfully.

  • Addresses a reliability issue that might generate stop error 0x51 (REGISTRY_ERROR). This issue might occur when applications use volatile registry keys excessively.

  • Addresses a rare issue that might degrade performance in applications that call Gdiplus.dll!GdipMeasureString in a tight loop with a new font on each call. This issue occurs after installing Windows updates released on and after February 2021.

  • Addresses an issue that always displays devices that RemoteFX USB redirects as “Remote Desktop Generic USB Device” instead of the actual device name.

  • Addresses an issue in which Set-RDSessionCollectionConfiguration does not set the camerastoredirect:s:value custom property.

  • Addresses a Local Security Authority Subsystem Service (LSASS) domain controller memory leak that is reported in Privileged Access Management (PAM) deployments.

  • Addresses an issue that prevents the Windows Server service from starting if SrvComment is greater than 128 characters.

  • Addresses an issue that prevents access to files on a Server Message Block (SMB) share when you enable Access Enabled Enumeration (ABE).

  • Addresses an issue in the Windows Network File System (NFS) client that might prevent you from renaming a file after mounting an NFS share. This issue occurs if you rename the file using File Explorer, but does not occur if you rename the file using command line.

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. It is required that SSU update KB5004314 dated July 13, 2021 (or SSU KB5004314 dated July 29, 2021) is installed before the preview update is installed. Microsoft does not list any known issues with this update. If in doubt, more details can be found in the support article.

In addition, Microsoft has made direct improvements to the update client for Windows 10 to improve its reliability.

Similar articles:
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PrintNightmare out-of-band update also for Windows Server 2012 and 2016 (July 7, 2021)
Microsoft Security Update Summary (July 13, 2021)
Patchday: Windows 10-Updates (July 13, 2021)
Patchday: Windows 8.1/Server 2012-Updates (July 13, 2021)
Patchday: Updates für Windows 7/Server 2008 R2 (July 13, 2021)
Patchday Microsoft Office Updates (July 13, 2021)
Windows 10 2004-21H1: Preview Update KB5004296 (July 29, 2021)


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