Windows 10 build 19044.1865 (KB5015878) outs as preview

Microsoft begins testing the next fixes and improvements coming to Windows 10.

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Windows 10 update KB5015878
Windows 10 update KB5015878
  • Microsoft releases update KB5015878 as a preview for Windows 10 21H2.
  • The update bumps the version number to build 19044.1865.
  • The update KB5015878 introduces non-security fixes and improvements.
  • The company re-releases build 19044.1862 as 19044.1865 with one additional fix.

Microsoft is rolling out KB5015878 as a preview for the next update of Windows 10 21H2. The update was originally released in the Release Preview Channel, but now it’s also available in the stable channel as an optional install with non-security fixes and improvements.

According to the company’s announcement, the update KB5015878 bumps the version number to build 19044.1865 and provides consent to receive urgent notifications when using focus assist. It also restores functionality for Windows Autopilot deployment scenarios that are affected by the security mitigation for hardware reuse, improves IOPS performance in specific scenarios, improves the reset reliability after an upgrade, and more.

Update KB5015878 fixes and changes for Windows 10

These are the fixes and improvements coming to the next update of Windows 10:

  • Provided the ability for you to consent to receive urgent notifications when focus assist is on.
  • Restored functionality for Windows Autopilot deployment scenarios that are affected by the security mitigation for hardware reuse. This update removed the one-time use restriction for self-deploying mode (SDM) and pre-provisioning (PP). This update also re-enabled any User Principal Name (UPN) display in user-driven mode (UDM) deployments for approved manufacturers.
  • Reduced the overhead of resource contention in high input/output operations per second (IOPS) scenarios that have many threads contending on a single file.
  • Improved the reliability of a push-button reset after an OS upgrade.
  • Fixed an issue that makes the tenant restrictions event logging channel inaccessible if you remove the EN-US language pack.
  • Fixed an issue that prevents troubleshooters from opening.
  • Updated the Remove-Item cmdlet to interact with Microsoft OneDrive folders properly.
  • Fixed an issue that causes certain docking stations to lose internet connectivity when waking from Sleep mode.
  • Added functionality that caches additional audio endpoint information to improve the OS upgrade experience.
  • Fixed an issue that might cause consecutive video clip playback to fail in games that use DX12.
  • Fixed an issue that affects certain games that use the XAudio API to play sound effects.
  • Fixed an issue that causes port mapping conflicts for containers.
  • Fixed an issue that causes Code Integrity to continue trusting a file after the file has been modified.
  • Fixed an issue that might cause Windows to stop working when you enable Windows Defender Application Control with the Intelligent Security Graph feature turned on.
  • Fixed an issue that affects the height of the Search box when you use multiple monitors that have different resolutions as measured dots per inch (DPI).
  • Fixed an issue that prevents the Storage Migration Service (SMS) from completing inventory on servers that have many shares. The system logs error event 2509 in Microsoft-Windows-StorageMigrationService/Admin channel (ErrorId=-2146233088/ErrorMessage=”Invalid table id”).
  • Fixed an issue that causes the Windows profile service to fail sporadically. The failure might occur when signing in. The error message is, “gpsvc service failed to sign in. Access denied”.

Download update KB5015878 for Windows 10

The update is available immediately and will download and install automatically through the Release Preview Channel and stable channel. However, you can always force the update from Settings > Update & Security > Windows Update, click the Check for updates button, and use the option to install the optional update.

Update July 28, 2022: This story has been updated to reflect that Microsoft is now making available the update in the stable channel as build 19044.1865.

About the author
Avatar for Mauro Huculak

Mauro Huculak is a Windows expert and the Editor-in-Chief who started Pureinfotech in 2010 as an independent online publication. He is also been a Windows Central contributor for nearly a decade. Mauro has over 12 years of experience writing comprehensive guides and creating professional videos about Windows, software, and related technologies, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and About.me.