Windows 11 Insider Preview Build 27858 has been released to the Canary Channel, introducing a new system tray icon for enhanced emoji and GIF access. The update also addresses various bugs, improves File Explorer accessibility, and refines desktop icon visibility. Insiders are reminded that features may evolve and not all will be released.

Windows 11 Insider Preview Build 27858: What’s New?
On May 16, 2025, Microsoft announced the release of Windows 11 Insider Preview Build 27858 to the Canary Channel. This build introduces exciting new features and improvements aimed at enhancing user experience.
New System Tray Icon for Emojis
One of the standout features is the new system tray icon for the emoji and more panel. This addition makes it easier to express yourself across all apps. Now, users can access emojis, GIFs, and Kaomojis with a simple click.
“With this new system tray icon, you can easily express yourself by using emojis, GIFs, and more.”
Major Updates and Fixes
Several significant updates accompany this build. For instance, the accessibility of File Explorer has improved, with better text scaling support. This enhancement makes navigating through files more user-friendly, especially for those with visual impairments.
Moreover, the desktop icons have been updated to ensure they are larger and easier to see. Users may need to create new shortcuts to see these changes take effect.
Performance Improvements
This build also addresses various performance issues. Notably, it fixes a black screen problem during upgrades and resolves text disappearing across the system. Additionally, users can expect smoother functionality with voice typing and snap layouts.
“Features may change over time, be removed, or replaced and never get released beyond Windows Insiders.”
Important Notes for Insiders
For those using Copilot+ PCs, switching to the Canary Channel may result in losing your Windows Hello PIN and biometrics. However, you can easily recreate your PIN by clicking “Set up my PIN.”
Moreover, users may encounter some known issues, such as non-responsive pen input on certain PCs. It’s essential to report any localization issues via the Feedback Hub.
Final Thoughts
Overall, Windows 11 Insider Preview Build 27858 brings several exciting features and crucial fixes. As always, remember that these builds are experimental and may not represent final releases. Stay tuned for more updates as Microsoft continues to refine Windows 11!
From the Windows Blog