Microsoft Releases Windows 11 Dev Build 26120.1340 with Enhanced Mouse Control and Energy-Saving Options

Microsoft typically releases new versions of Windows Insider on Thursdays or Fridays, making today's release quite unexpected. The company highlighted the unusual Monday release on X/Twitter.

The latest version, Windows 11 Dev Build 26120.1340, is updated through the cumulative update KB5040557. This update includes some new features and improvements that are currently being tested.

Update Log:

• Mouse Control in Settings: In Settings, under Bluetooth & devices, on the Mouse settings page, there's now an option to disable enhanced mouse pointer precision. This can be turned off if users prefer not to use this feature. Additionally, there's a new option to change the scroll direction of the mouse wheel.
• Improvements to Voice Access: Microsoft continues to enhance the spelling correction experience within Voice Access. Users can now experience spelling corrections throughout Voice Access.
• Energy Saving Settings: For laptops using battery power, if the battery level reaches 20% and the energy-saving setting is set to always on, the system will automatically prompt for charging.
• Energy Saving Recommendations: Under Settings, Power & battery, and Energy recommendations, there's a new recommendation to turn off HDR to save energy.

Fixed Issues:

• Microsoft has fixed an issue in Settings, Privacy & security, Location, and Allow desktop apps to access your location page, where some options might flicker abnormally.

Known Issues:

• • PCs running Windows 11 24H2 Build 26100.xxxx and joining the Windows Insider Dev Channel will now show a "fix" version, indicating the system can be upgraded, not that there are other issues.
  • Adding other languages or optional features to this version may fail with error code 0x800f081f.
  • Windows Sandbox may not start correctly in this version, with error code 0x80370106.
  • Switching between different pages in Task Manager may cause it to crash.
  • Microsoft is addressing color display issues in the performance page of Task Manager in dark mode.