Skip to the content
The Update Bureau
Windows 11 Windows 11 Insider Insider Preview, Release Preview Channel
Windows Insider

Build 19045.6280

Build 19045.6280: Windows Insider Release Preview Channel, August 2025. Organization backup reaches general availability; text and search fixes

In short

Windows 10 22H2 Insiders in the Release Preview Channel get build 19045.6280, with updated country and operator profiles, new organization backup availability, a network-blocking option for eligible customers, and several fixes.

Does it affect you? Applies to: Insiders in the Release Preview Channel who are on Windows 10, version 22H2.

Build
19045.6280

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 8 changes

Update

For: Insiders in the Release Preview Channel

  • A small update addresses some issues with the update itself.1

Common Controls

For: Insiders on Windows 10, version 22H2

  • Some supplementary characters display correctly in Windows text boxes.2

Multimedia

For: Insiders using Remote Desktop Services

  • Redirected webcams can be enumerated in Remote Desktop Services environments.3
    Fixes an issue where mf.dll failed to enumerate redirected webcam devices in Remote Desktop Services (RDS) environments.

Windows Hello

For: Insiders using Narrator and Facial Recognition settings

  • Narrator reads the correct name for the “Enhance Facial Recognition Protection” check box.4

Family Safety

For: Families using blocked-app approvals

  • The “Ask to Use” approval flow appears when someone accesses a blocked app.5

Portable Devices

For: Insiders using the policy

  • The removable-storage access policy works properly.6
    Fixes an issue that may affect the Removeable Storage Access policy.

Input and Composition

For: Insiders using the Chinese Simplified IME

  • Some extended characters no longer appear as empty boxes when using the Chinese Simplified IME.7
    Fixes an issue with the Chinese Simplified Input Method Editor (IME).

Search pane

For: Insiders on Windows 10, version 22H2

  • The Windows Search pane displays its preview pane correctly.8

New features 2 changes

Licensing

For: Customers using keyless Commercial ESU with a Windows 365 subscription

  • Eligible customers can block outbound network traffic when using the Windows 10 keyless Commercial ESU solution alongside a Windows 365 subscription.9
    The feature supports compliance with Zero Exhaust policies.

Windows Backup for Organizations

  • Windows Backup for Organizations is generally available for organizations to back up and restore devices during transitions.10
    The solution supports device refreshes, upgrades to Windows 11, and deployments of AI-powered PCs.

Improvement 1 change

Mobile Operator Profiles

For: Insiders on Windows 10, version 22H2

  • Country and operator settings profiles are updated.11
    Updates Country and Operator Settings Asset (COSA) profiles.

Technical details

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

Data sheet

Released
2025-08-14
Type
Windows Insider build
VersionBuildChannel
— 19045.6280 Release Preview Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (11)
  1. 1. We are releasing Build 19045.6280 (KB5063842) today which is a small update that addresses some issues with the update itself. blogs.windows.com
  2. 2. Fixed: An issue that affects how certain supplementary characters appear in Windows textboxes. blogs.windows.com
  3. 3. Fixed: An issue where mf.dll failed to enumerate redirected web camera devices on Remote Desktop Services (RDS) environments. blogs.windows.com
  4. 4. Fixed: An issue in which Narrator reads the incorrect name for the “Enhance Facial Recognition Protection” check box under the Facial Recognition setting. blogs.windows.com
  5. 5. With this fix, the approval flow now appears as expected when a blocked app is accessed. blogs.windows.com
  6. 6. Fixed: An issue where the Removeable Storage Access policy may not work properly. blogs.windows.com
  7. 7. Fixed: An issue with the Chinese Simplified Input Method Editor (IME). Some extended characters were shown as empty boxes. blogs.windows.com
  8. 8. Fixed: An issue that might cause the Windows Search pane to not show the preview pane correctly. blogs.windows.com
  9. 9. This update adds a new feature that allows customers using the Windows 10 keyless Commercial ESU solution—alongside a Windows 365 subscription—to block outbound network traffic. blogs.windows.com
  10. 10. Windows Backup for Organizations is now generally available! blogs.windows.com
  11. 11. Updated: Country and Operator Settings Asset (COSA) profiles. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 11 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