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Windows 11 Windows 11 Insider 26H1 Insider Preview, Experimental Channel
Windows Insider

Build 28120.3454

Build 28120.3454: Windows Insider Experimental Channel, November 2026. Windows Hello screen brightening and simpler security key sign-in

In short

Windows Hello can brighten the screen in dim rooms, and security key sign-in has a clearer PIN screen. These changes are rolling out to Insiders in the Experimental (26H1) Channel.

Does it affect you? Applies to: Devices running this build in the Experimental (26H1) Channel.

Build
28120.3454

This is a test build for people in the Windows Insider Program. Features in it can change, be removed, or never reach regular Windows releases.

What changes

Improvements 2 changes

General

Gradual rollout
  • A small set of general improvements and fixes improves the experience for Insiders running this build.1

Security

Gradual rollout

For: Insiders running this build

  • The security key PIN screen no longer shows the “other user” icon, making sign-in clearer.2
    The updated security key PIN entry experience removes the “other user” icon.

New feature 1 change

Windows Hello

Gradual rollout

For: Insiders running this build

  • Windows Hello can brighten the screen during face recognition in dark or dim rooms.3
    Turn on “Automatically adjust screen brightness during face recognition” under Settings > Accounts > Sign-in options > Facial recognition (Windows Hello).

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-11-06
Type
Windows Insider build
VersionBuildChannel
— 28120.3454 Experimental Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (3)
  1. 1. This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs. learn.microsoft.com
  2. 2. The security key PIN entry experience has been updated, removing the "other user" icon for a clearer sign-in experience. learn.microsoft.com
  3. 3. Windows Hello facial recognition can temporarily brighten your screen to help you sign in when you're in a dark or dimly lit room. learn.microsoft.com
Checked automatically: 8 of 8 checks passed, 3 quoted passages
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake