Microsoft has rolled out Windows 11 Preview Build 22635.4440 to Beta Channel Insiders, introducing a significantly improved Windows Hello experience alongside several under-the-hood enhancements. This latest preview build focuses on refining biometric authentication while maintaining the security standards Windows users expect.

What’s New in Windows Hello

The highlight of Build 22635.4440 is the revamped Windows Hello authentication system, which now offers:

  • Faster facial recognition – Reduced latency when signing in
  • Improved low-light performance – Better accuracy in dimly lit environments
  • Enhanced anti-spoofing – Additional protection against presentation attacks
  • Streamlined enrollment – Simplified setup process for new users

Microsoft has optimized the underlying algorithms to make Windows Hello more responsive while maintaining its enterprise-grade security. Early testing shows recognition speeds improved by up to 15% compared to previous builds.

Security Enhancements

Beyond Windows Hello, this build includes several security-focused improvements:

  • Updated credential guard protections
  • Refined memory management for security processes
  • Additional mitigations against speculative execution vulnerabilities

These changes continue Microsoft's commitment to making Windows 11 the most secure Windows version yet.

User Experience Refinements

The build also delivers quality-of-life improvements:

Sign-in Process

  • Smoother transitions between lock screen and desktop
  • More intuitive error messages when authentication fails
  • Better feedback during biometric enrollment

Accessibility

  • Improved screen reader compatibility for authentication flows
  • High contrast mode enhancements for security dialogs

Known Issues

As with any preview build, some limitations exist:

  • Occasional delays in Hello recognition on some hardware
  • Compatibility issues with certain third-party security software
  • Temporary UI glitches during fast user switching

Microsoft recommends Insiders file feedback through the Feedback Hub for any encountered issues.

Under the Hood Changes

Developers will appreciate several backend improvements:

  • Updated Windows Biometric Framework API
  • New group policies for enterprise Hello management
  • Enhanced logging for authentication troubleshooting

These changes lay groundwork for future Windows Hello capabilities expected in upcoming releases.

How to Get the Update

Beta Channel Insiders can download Build 22635.4440 through Windows Update:

  1. Open Settings > Windows Update
  2. Click "Check for updates"
  3. Select "Download and install" when the build appears

Note that Microsoft continues its phased rollout approach, so the build may not be immediately available to all Insiders.

Looking Ahead

This build represents another step in Microsoft's ongoing effort to perfect Windows Hello before the next major Windows 11 feature update. With biometric authentication becoming increasingly important for both security and convenience, these improvements could significantly impact how users interact with their devices daily.

Insiders should watch for future builds that may expand on these Hello enhancements while Microsoft gathers feedback from the Beta Channel testing pool.