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Microsoft has released Windows 11 Insider Preview Build 25921 to Windows Insiders in the Canary channel.

Announcing Windows 11 Insider Preview Build 25921

Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 25921 to the Canary Channel. 

What’s new in Build 25921

HDR Background Support 

You can now set JXR files to be your desktop background and if you have an HDR display, they will render in full HDR.

Rich thumbnail previews (tooltips) for cloud files on Start

For people logged into a Windows 11 Pro or Enterprise editions with an AAD account ( soon to be Microsoft Entra ID), we are providing a richer thumbnail preview (tooltips) when hovering over cloud files such as Word documents under Recommended on the Start menu. For this initial release, richer thumbnail previews will not be available for all files and a later update will enable the experience for more files and for MSA users. Additionally, when right-clicking on cloud file recommendations, there is now an option to quickly share these files.

Changes and Improvements


  • Cortana can be uninstalled in this build. For more on the end of support for Cortana, New mini communications experience in Microsoft Teams (free).

[Task View & Desktops]

  • When navigating between desktops in Task View (WIN + CTRL + left or right arrows), labels will be shown. New sliding animations will also show when you change your desktops using trackpad gestures, touch gestures, hotkeys and by clicking on the Task View flyout.
Labels will appear when switching between desktops.


  • A new asynchronous error-handling feature in the DHCP client service will allow for faster response time for some runs of ipconfig /renew on the Windows command line. Improvements will vary depending on system and network conditions, but ideal cases will improve from ~4.1 seconds to ~0.1 seconds per run.

Announcing Windows 11 Insider Preview Build 25921