Microsoft has initiated a broad rollout of new Windows 11 Insider Preview builds, targeting users across the Beta, Experimental, and Release Preview channels. The update, announced on July 20, 2026, introduces specific version increments designed to test upcoming features and system stability for participants enrolled in the program.
For those currently in the Experimental channel, Microsoft has released build 26300.8935. This update follows the company's ongoing efforts to refine the operating system's performance and feature set before wider public deployment. Users in the Beta channel are receiving build 26220.8925 as part of the same release cycle.
The company also addressed users on the 26H1 development track, providing build 28020.2539 for the Beta channel. However, Microsoft noted that there were no new builds available today for the Experimental channel specifically under the 26H1 or future platform designations, advising users to monitor the official blog for subsequent updates.
In addition to the primary development channels, Microsoft updated the Release Preview channel to accommodate multiple versions of the operating system. Users running 24H2 or 25H2 versions are now receiving builds 26100.8942 and 26200.8942, respectively. Furthermore, those on the 26H1 Release Preview track have been provided with build 28000.2597.
These updates are part of the standard Windows Insider Program workflow, which allows Microsoft to gather telemetry and user feedback on pre-release software. By segmenting these builds across different channels, the company manages the testing of various feature sets and stability improvements before they are finalized for the general consumer base.