Windows 11 Insider Beta Preview Build 26220.8474

Release date: 15 May 2026

Changes and improvements

[Windows Insider channel movement]

  • As announced in the Windows Insider Blog, we will begin moving users in the Beta Channel to the new Beta experience.

[Voice access and Voice typing]

  • Fluid Dictation is now available in Spanish & French for Windows Insiders! It makes voice-based dictation smoother and smarter by automatically correcting grammar, punctuation, and filler words as you speak, reducing the need for manual editing. This experience is powered by on-device small language models (SLMs) to ensure fast and private processing. You can try out fluid dictation from Windows voice access or Voice typing (Win +H).

[File Explorer]

  • Fixed an issue in the previous flight where Properties wasn’t invoking correctly for the Recycle bin and some other scenarios.

[Other]

  • This update improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.
  • Improved reliability of running dism /online /cleanup-image /restorehealth command.

Known Issues

[Reset PC]

  • Resetting your PC may get stuck when using “Reset this PC.” To complete the reset successfully, choose the cloud download option (Cloud PBR) instead of local.

Reminder for Windows Insiders in the Beta Channel

  • Updates are based on Windows 11, version 25H2 via an enablement package (Build 26220.8474).

  • The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.

  • 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.

  • 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.

  • Check out Flight Hub for a complete look at what build is in which Insider channel.