On Tuesday, Microsoft releases the optional KB5015878 Preview cumulative update for Windows 10 20H2, Windows 10 21H1, and Windows 10 21H2.
This update consists of numerous bug fixes and enhancements which include gaming and Windows Autopilot fixes and a new Focus Assist feature.
The KB5015878 cumulative update preview is part of Microsoft’s July 2022 monthly “C” update, allowing admins to test upcoming fixes released in the August 2022 Patch Tuesday.
Unlike Patch Tuesday cumulative updates, the “C” preview updates are voluntary and do not include security updates. However, If you run a Windows Insider build, the preview update will automatically be installed.
Windows users can install this update by going into “Settings”, clicking on “Windows Update”, and manually performing a ‘Check for Updates.’
As this is an optional update, you will be asked whether you want to install it by clicking on the ‘Download and install’ link.
Users of Windows 10 can also manually download and install the KB5015878 preview update from the Microsoft Update Catalog.
Microsoft has highlighted sixteen improvements with this update, including a new focus assist feature, a Windows Autopilot fix, and fixes for video and audio playback in games.