Announcing Windows 11 Insider Preview Build 27766 (Canary Channel)

Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 27766 to the Canary Channel.

We are also not planning to release SDKs for 27xxx series builds for the time being.

Changes and Improvements

This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.

We fixed the issue where if you roll back from Build 27764 to an earlier build (including if the upgrade failed), you would see an “Your organization used App Control for Business to block this app” dialog when attempting to use or install certain third-party apps on your PC due to an incorrect policy being enforced.

As of the latest Insider Preview builds in the Canary Channel, the main issues causing Insiders to experience an increase in rollbacks (with error code 0xc190010) when attempting to upgrade have been addressed. As a reminder, 0xc190010 is a generic error code that has multiple root causes, so if you’re continuing to experience issues, please file feedback (WIN + F) to investigate.

Fixed an underlying issue which was causing some Insiders in Canary to experience frequent explorer.exe crashes after they clean installed or reset their PC.

[IMPORTANT NOTE FOR COPILOT+ PCs] If you are joining the Canary Channel on a new Copilot+ PC from the Dev Channel, Release Preview Channel or retail, you will lose Windows Hello pin and biometrics to sign into your PC with error 0xd0000225 and error message “Something went wrong, and your PIN isn’t available”. You should be able to re-create your PIN by clicking “Set up my PIN”.
We’re working on the fix for an underlying issue causing accent colored window borders to not be not displayed when enabled, shadows around windows not displaying when enabled, and window launching (and other) animations to show even though the setting to show animations is turned off.

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