Windows 11 Insider Preview Build 25905 finally arrived on the Canary channel

July 13, 2023

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After a week without any insider build, the hotly-anticipated Windows 11 Insider Preview Build 25905 has finally been launched for those who’d opted for the Canary channel. 

This build includes new features that were previously introduced in the Dev Channel with Build 23493. These features encompass Dev Drive, Backup and Restore improvements, Dynamic Lighting, the Windows App SDK version of File Explorer and Gallery, as well as the eagerly-awaited AI Hub on Microsoft Store.

Some of the key takeaways include an early implementation of critical kernel features in Safe Rust. This is a small trial, but Microsoft plans to continue to increase the usage of Rust in the kernel in the future.

Starting in this build, support for Arm32 UWP applications has also been removed from Windows on Arm. This means that any installed Arm32 applications will no longer launch on your device.

Then, New PostAuthenticationAction support for terminating individual processes in Windows LAPS: This build includes a new option for the PostAuthenticationActions Group Policy that allows you to terminate specific individual processes that were launched in an OTS (over-the-shoulder) elevation scenario.

What other improvements and fixes that come with this build, you may ask? Here’s everything we’ve noted from Microsoft’s official release note. 

Windows 11 Insider Preview Build 25905: What to expect?


  • With the update of our color font format to COLRv1, Windows is now able to display richer emoji with a 3D like appearance with support coming soon to some apps and browsers. These emoji use gradients to bring the design style that our customers have been asking for. The new emoji will bring more expression to your communications.
Before and after of the updated color format for emoji.
Before and after of the updated color format for emoji.


  • In celebration of Marvel Studio’s Guardians of the Galaxy Volume 3, we temporarily re-launched last month. We also took the opportunity to fix an issue that was causing some challenges in getting the original Zune drivers to install in Windows 11 with this build in the Canary Channel. So now it should be easier to use your (totally unsupported and still discontinued) Zune on Windows 11. Over time, the fix will make its way through the Insider Channels and eventually to all Windows 11 customers. For fun, check out how Scott Hanselman brought a few Zunes back to life.

Known issues

  • [NEW] This build will not be offered to ASUS devices or PCs with ASUS motherboards.
  • [NEW] Ethernet-connected devices may lose network connectivity after updating to this build. Unplugging the ethernet cable and re-plugging the cable in should resolve the issue.

Have you taken Windows 11 Insider Preview Build 25905 out for a spin? Let us know in the comments!


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