Windows Insider

Canary Channel builds

4 builds, newest first.

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Terms & labels

Label legend

Security: Contains fixes for security vulnerabilities.
Preview: Optional update with new features and fixes, without new security patches. Its content joins the next Patch Tuesday update.
Out-of-band: Released outside the usual monthly schedule, usually to fix a specific problem.
Cumulative: Includes everything from earlier updates, so the latest one is enough.
Zero-day: Microsoft reports a vulnerability that was already exploited or publicly known when the fix came out.
Windows Insider Preview: A pre-release build for testers, not meant for everyday PCs.
Updated: We revised this page after publishing because Microsoft changed its notes.

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Windows 11 Windows 11 Insider 26H1 Insider Preview

Canary Channel

Build 28020.1738 Mar 13, 2026
Canary servicing test requires a restart but adds no features

This Canary update tests the servicing process without adding features or changing the displayed build version. A restart is required.
What's being tested

Note The update adds no new features; it tests servicing for Canary builds. A restart is required, and the device build version stays the sa...

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Windows 11 26H1 · KB5084491
Windows 11 Windows 11 Insider 26H2 Insider Preview

Canary Channel

Build 27975.984 Oct 23, 2025
Start menu scrolling and sleep or shutdown problems

Cumulative Update Build 27975.984 for the Canary Channel tests the servicing pipeline and includes no new changes. Known issues include unexpected Start menu scrolling and sleep or shutdown problems.
What's being tested

Note Build 27975.984 does not add anything new; it tests the servicing pipeline for Canary Channel builds.

Note The new Start menu may unexpectedly scroll to the top. Microsoft is investigating reports that sleep and shutdown are not working corre...

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Windows 11 26H2 · KB5070899
Windows 11 Windows 11 Insider 24H2 Insider Preview

Canary Channel

Build 26100 Apr 3, 2024
Shutdown and hibernate fixes, plus Copilot keyboard access

Brings Canary and Dev Insiders fixes for shutdown, hibernate, Microsoft Store updates, Copilot keyboard access, and screen flickering. A later update for Dev Insiders tests the servicing pipeline.
What's being tested 2 improved · 4 fixes

Improved Servicing: The Dev Channel is starting to receive build 26100.268 to test the servicing pipeline. It is the same as the April 2024 security update...

Improved Desktop watermark: The build watermark is not shown in the lower-right corner of the desktop in this build; it is expected to return in future Insider Pre...

Fix Shutdown and hibernate: Shutdown and hibernate work after a fix for an issue affecting the latest builds.

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Windows 11 24H2

Changes

2 improved · 4 fixes

Areas

Servicing (+5)
Windows 11 Windows 11 Insider Insider Preview

Canary Channel

Build 26090 Mar 28, 2024
Widgets navigation, SMB controls, and taskbar crash fix

Build 26090 reaches the Canary and Dev Channels with a redesigned Widgets navigation experience, new SMB controls, and fixes for crashes and other issues. Canary Insiders can temporarily switch to the Dev Channel while both channels share this build.
What's being tested 4 new · 4 improved · 6 fixes

New Canary and Dev Channels: Canary Insiders can switch to the Dev Channel while both channels receive the same build. This opportunity will close when Canary moves...

New SMB over QUIC client: Administrators can disable the SMB over QUIC client.

New SMB over QUIC client connection auditing: Successful SMB over QUIC client connections are recorded in the event log with the QUIC transport.

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Changes

4 new · 4 improved · 6 fixes

Areas

Canary and Dev Channels (+12)

Canary Channel builds

Canary servicing test requires a restart but adds no features

Start menu scrolling and sleep or shutdown problems

Shutdown and hibernate fixes, plus Copilot keyboard access

Widgets navigation, SMB controls, and taskbar crash fix