Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 27950 to the Canary Channel.
Changes and Improvements
[General]
- This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.
[Settings]
- Advanced Settings will revert to the previous “For Developers” experience after updating to this build. This change will come back soon.
Fixes
[General]
- Fixed an issue causing some Insiders to experience a rollback attempting to install the latest build with either an 0xC1900101-0x20017 error or 0xC1900101-0x30017 error.
[Taskbar and System Tray]
- Fixed an issue which could cause the app preview windows in the taskbar to become misaligned (away from the app icon you’d clicked / hovered over) after a display resolution change.
[File Explorer]
- Fixed an issue where interacting with the context menu in File Explorer could lead to the body of File Explorer becoming unresponsive to clicks.
- Fixed an issue which could lead to certain apps hanging when launching the Open or Save Dialog.
- Fixed an issue where with certain apps installed, when you right clicked you may see the context menu unexpectedly switch back and forth with each right click between the normal initial view and “Show more options”.
[Graphics]
- Fixed an which was causing some Insiders to experience screen flickers when using the browser (and potentially other scenarios) in the latest Canary builds.
[Audio]
- If you were having issues with audio not working after the latest updates, that should be resolved now. Audio issues can have multiple root causes, though, so if you continue experiencing issues, please file feedback under Devices and Drivers > Audio and Sound in the Feedback Hub, if possible including a trace by using the “Capture the issue” option in Step #4 of the problem report.
[Dynamic Lighting]
- Fixed an issue in Dynamic Lighting where the Dynamic Lighting Background Controller would occasionally consume excessive CPU after unlocking the machine.
[Other]
- We’ve done some underlying work to help improve performance when gaming with game bar or other overlays on top of your game. This may particularly help those with multiple monitors which have different refresh rates. As always, if you’re experiencing game performance issues, please file feedback including a trace of the issue, following these steps. Thanks Windows Insiders who’ve shared feedback so far!
Known issues
[General]
- We’re working on the fix for an issue causing some Insiders with Arm64 PCs to experience an increase in bugchecks (green screens) with error IRQL_NOT_LESS_OR_EQUAL in the latest Canary builds.
[For developers]
- PIX on Windows is unable to play back GPU captures on this OS version. This will be addressed by a new PIX release, estimated to arrive by the end of September. In the meantime, if you are impacted, you can use the “Send Feedback” button in PIX or contact us on the DirectX Discord server and we can help provide private builds.
Reminders for Windows Insiders in the Canary Channel
- The builds we release to the Canary Channel represent the latest platform changes early in the development cycle and should not be seen as matched to any specific release of Windows and features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may 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.
- Many features in the Canary Channel are rolled out using Control Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
- Some features may show up in the Dev and Beta Channels first before showing up in the Canary Channel.
- Some features in active development we preview with Windows Insiders may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.
- To get off the Canary Channel, a clean install of Windows 11 will be required. As a reminder – Insiders can’t switch to a channel that is receiving builds with lower build numbers without doing a clean installation of Windows 11 due to technical setup requirements.
- The desktop watermark shown at the lower right corner of the desktop is normal for these pre-release builds.
- Check out Flight Hub for a complete look at what build is in which Insider channel.
Thanks,
Amanda & Brandon
Source: https://blogs.windows.com/windows-insider/2025/09/19/announcing-windows-11-insider-preview-build-27950-canary-channel/
