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Windows 11 Windows 11 Insider 25H2 Insider Preview, Beta Channel
Windows Insider

Build 26220.9606

Build 26220.9606: Windows Insider Beta Channel, October 2026. Weather on the lock screen and cloud-based PC recovery

In short

Makes Weather the primary lock-screen widget, adds Cloud rebuild recovery, and fixes crashes in some apps and games.

Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Beta Channel.

Build
26220.9606

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

Fix 1 change

Other

For: Beta Channel Insiders

  • Some apps and games no longer crash because of an issue with msmpeg2ac3dec.dll.1
    Fixes an issue with msmpeg2ac3dec.dll.

Improvement 1 change

Widgets

For: Insiders on newer builds

  • Weather is the primary lock-screen widget, with less recommended content and more control over which widgets appear.2

New feature 1 change

Recovery

For: Beta Channel Insiders

  • Cloud rebuild reinstalls Windows to a clean state, even when Windows will not boot.3
    Cloud rebuild downloads the Windows image and device drivers from Windows Update.

Technical details

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

Data sheet

Released
2026-10-07
Type
Windows Insider build
VersionBuildChannel
— 26220.9606 Beta Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (3)
  1. 1. Fixed an issue with msmpeg2ac3dec.dll which was leading to some apps and games crashing recently. learn.microsoft.com
  2. 2. Weather will be the primary widget shown on the lock screen, reducing recommended widget content and making the experience feel more focused. We're also giving users more control of personalizing the widgets learn.microsoft.com
  3. 3. We're introducing Cloud rebuild, a new recovery option that restores a Windows 11 PC to a clean, known-good state by performing a full OS reinstall, even when Windows won't boot. 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