Windows 11 Receives Numerous Updates in Canary Build 27950

Windows 11 Preview Build 27950: Updates and Fixes Overview

Friday marks a new release of Windows 11 preview builds, with Microsoft rolling out three updates across its channels. The latest update, Build 27950, is now available for users in the Dev, Beta, and Canary Channels, addressing multiple bugs and enhancing overall system performance. Among the fixes, Microsoft has rectified issues that caused rollbacks during installations, particularly for those encountering specific error codes.

Notable adjustments include the reversion of the “Advanced”settings page to the previous “For Developers”designation. Microsoft has assured users that the “Advanced”options will be reintroduced in coming updates.

Changelog Highlights

General Enhancements:
- This build includes minor improvements aimed at enhancing the overall user experience for Windows Insiders.
Settings Update:
- The Advanced Settings feature has reverted to the original “For Developers”setup, with plans to restore new settings soon.
Error Resolutions:
- Fixed rollback issues that some insiders faced when installing new builds, notably associated with error codes 0xC1900101-0x20017 and 0xC1900101-0x30017.
Taskbar and System Tray Improvements:
- Corrected an alignment issue that caused app previews in the taskbar to misalign following display resolution changes.
File Explorer Fixes:
- Resolved a problem where context menu interactions could cause File Explorer to become unresponsive.
- Addressed performance issues where certain applications hung during the Open or Save dialog prompts.
- Fixed an issue where right-click context menus inadvertently oscillated between different views in certain applications.
Graphics Optimization:
- Resolved screen flickering issues encountered by some users when using a browser and potentially in other scenarios on the latest Canary builds.
Audio Issues Resolved:
- Audio problems experienced by some users should now be corrected. However, if audio issues persist, users are encouraged to provide feedback in the Feedback Hub, including traces of the issue.
Dynamic Lighting Enhancements:
- Resolved an issue where the Dynamic Lighting Background Controller would use excessive CPU resources post-unlock.
Gaming Enhancements:
- Under-the-hood work has been done to boost gaming performance, particularly for users with multi-monitor setups featuring varying refresh rates. Users experiencing game performance problems are invited to report issues along with traces.

Known Issues

The update comes with two acknowledged bugs that Microsoft is actively addressing:

General Bug:
- Some Insiders using Arm64 devices may experience an increase in bug checks, specifically the IRQL_NOT_LESS_OR_EQUAL error.
For Developers:
- Users of PIX on Windows will find inability to playback GPU captures in this OS version. This issue is being tackled with a new PIX release expected by the end of September. Affected users are encouraged to use the feedback feature in PIX or reach out via the DirectX Discord server for assistance.

For full details about this update, you can visit the official announcement post.

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