Windows 11 Insider Experimental Preview Build 26340.9482

Release date: 11 September 2026

Changes and improvements gradually being rolled out

Memory Integrity protection expands automatically to more eligible devices. As outlined in our recent blog, Windows might now enable Memory Integrity (HVCI) during updates on supported PCs to help improve security and prepare devices for advanced Windows security features, while respecting existing user or IT administrator choices.

Building on the work we've been doing to improve the context menu experience:

We've added a new teaching tip you might see as a first-time experience to help you learn about the customization options.
In theme with giving you more control, you can also now turn off the customize context menu entry in the new context menu settings.
We've fixed a few small issues with the Send To option in the context menu not working as expected.

Search from This PC in File Explorer is now indexer-based, making it much faster and consistent with search from File Explorer Home.

We updated the visual indicator shown during screen capture, changing the capture border from yellow to red to make active capture sessions easier to identify.

Screen capture displaying a red border around the captured area.

Made some small visual adjustments to improve the design of the Temporary files page under Settings > System > Storage.
Fixed an issue causing mouse cursor customization to not work correctly after the latest flights.
Fixed an issue causing desktop background customization to not persist after a reboot after the latest flights.

Fixed an underlying issue resulting in some Insiders experiencing issues with brightness after the latest flights, including brightness settings being unexpectedly grayed out. File a new piece of feedback with as many details as possible if you continue experiencing issues.

Updates are based on Windows 11, version 26H2 via an enablement package (Build 26340.9482).
Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time. We monitor feedback to see how they land before pushing them out to everyone in this channel.
The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
Check out Flight Hub for a complete look at what build is in which Insider channel.