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Build 19045.6159

Build 19045.6159: Windows Insider Release Preview Channel, July 2025. ESU enrollment wizard fix and Secure Boot anti-rollback support

In short

Build 19045.6159 for Windows 10 version 22H2 Insiders in the Release Preview Channel includes an ESU enrollment wizard fix, Secure Boot anti-rollback support, and a fix for rare device stability problems.

Does it affect you? Applies to: Windows 10 version 22H2 devices enrolled in the Release Preview Channel.

Build
19045.6159

Microsoft publishes separate notes for this KB for Windows 10.

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

Fixes 2 changes

Windows 10 Extended Security Updates (ESU) enrollment wizard

For: Windows 10 users enrolling in ESU

  • The enrollment wizard no longer unexpectedly closes after you select “Enroll now.”1
    The issue occurred because incomplete app registration prevented the wizard from loading correctly.

Stability

  • In rare cases, devices no longer become unresponsive in specific scenarios after installing the May 2025 security update and subsequent updates.2

Improvements 2 changes

Update

For: Insiders in the Release Preview Channel

  • A small follow-up update addresses some issues with the update itself; the issues are not specified.3

Mobile Operator Profiles

For: Devices using mobile operator profiles

  • Country and mobile operator settings profiles are updated.4
    Updates Country and Operator Settings Asset (COSA) profiles.

New feature 1 change

Secure Boot

For: Devices using Secure Boot

  • Devices can use new anti-rollback protections for SKUSiPolicy VBS.5
    Adds the ability to deploy SKUSiPolicy VBS Anti-rollback protections through the Secure Boot AvailableUpdates registry key.

Technical details

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

Data sheet

Released
2025-07-10
Type
Windows Insider build
VersionBuildChannel
— 19045.6159 Release Preview Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (5)
  1. 1. Some users experienced a problem where clicking “Enroll now” caused the wizard window to open, begin loading, and then close unexpectedly. blogs.windows.com
  2. 2. Some devices became unresponsive and stopped responding in specific scenarios. blogs.windows.com
  3. 3. We are releasing Build 19045.6159 (KB5062649) today which is a small update that addresses some issues with the update itself. blogs.windows.com
  4. 4. [Mobile Operator Profiles] Updated: Country and Operator Settings Asset (COSA) profiles. blogs.windows.com
  5. 5. [Secure Boot] New! Adds the ability to deploy SKUSiPolicy VBS Anti-rollback protections through the Secure Boot AvailableUpdates registry key. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 5 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 4/5, 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