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Windows Insider

Build 26090

Build 26090: Windows Insider Canary Channel, March 2024. Widgets navigation, SMB controls, and taskbar crash fix

In short

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.

Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Canary and Dev Channels.

Build
26090
Review notes Additional details from the official release notes (3) Read notes
  • What changes Microsoft started rolling out Dev Channel Cumulative Update Build 26090.112 (KB5037477) on March 29. It adds nothing new and is designed to test the servicing pipeline.
  • In detail Microsoft is investigating reports that some Canary and Dev Insiders are stuck on Build 26040 or Build 23620.
  • In detail Windows Ink writing does not work in the updated Copilot experience that lets Copilot act like a normal application window.

The official sources are linked at the end of the page.

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 6 changes

Video playback and games

  • Video stutters in some apps are fixed; the issue might also have affected frame rates in some games.1

Taskbar and System Tray

  • The crash affecting taskbar reliability is fixed.2
    Fixes an explorer.exe crash.

File Explorer

  • File Explorer no longer unexpectedly shows its previous design without tabs in the latest builds.3

Task Manager

  • Processes can stop properly after you close apps, even if Task Manager has been open.4
    Fixes Task Manager sometimes holding process handles.

Windowing

2 items
  • App windows can use the bottom half of secondary monitors again when maximizing.5
  • Dragging windows no longer triggers the reported crash for some Insiders.6
    Fixes an explorer.exe crash when dragging windows.

Improvements 4 changes

Widgets board

Gradual rollout

For: Insiders in the Canary Channel

  • A new navigation pane on the left lets you switch between a widgets-only dashboard and other integrated dashboards, such as Discover.7

Desktop build watermark

For: everyone in the Canary and Dev Channels

  • The build watermark is not shown in the lower-right corner of the desktop in this build; it will return in a future Insider Preview build.8

Copilot in Windows

For: Copilot in Windows preview users with a local account

  • With a local Windows account, you can use Copilot in Windows ten times after signing in. After that, you need to sign in with a Microsoft account or Microsoft Entra ID account; some Copilot features might not work if you do not sign in.9

Delivery Optimization settings

For: everyone in the Canary and Dev Channels

  • The Delivery Optimization settings page has returned to its previous design. The redesigned page is expected to return in a future build after bugs are fixed.10
    The page is under Settings > Windows Update > Advanced options > Delivery Optimization.

New features 4 changes

Canary and Dev Channels

For: Insiders in the Canary Channel

  • Canary Insiders can switch to the Dev Channel while both channels receive the same build. This opportunity will close when Canary moves to higher build numbers.11

SMB over QUIC client

  • Administrators can disable the SMB over QUIC client.12
    Use Group Policy at Computer Configuration\Administrative Templates\Network\Lanman Workstation\Enable SMB over QUIC, or run Set-SmbClientConfiguration -EnableSMBQUIC $false in an elevated PowerShell console.

SMB over QUIC client connection auditing

  • Successful SMB over QUIC client connections are recorded in the event log with the QUIC transport.13
    Find the events in Applications and Services Logs\Microsoft\Windows\SMBClient\Connectivity (Event ID 30832).

SMB signing and encryption auditing

  • Administrators can audit whether third-party SMB clients or servers support signing and encryption.14
    Configure auditing through PowerShell or Group Policy. SMBClient Audit events use IDs 31998 and 31999; SMBServer Audit events use IDs 3021 and 3022.

Technical details

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

Data sheet

Released
2024-03-28
Type
Windows Insider build
VersionBuildChannel
— 26090 Canary Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (14)
  1. 1. Fixed an issue which was causing video stutters in some apps (and possibly impacting FPS in some games) in the previous flight. blogs.windows.com
  2. 2. Fixed an explorer.exe crash that was impacting taskbar reliability. blogs.windows.com
  3. 3. Fixed an issue causing some Insiders to see File Explorer unexpectedly using the previous design and have no tabs in the latest builds. blogs.windows.com
  4. 4. Fixed an issue where Task Manager was holding onto process handles sometimes, leading to processes not stopping when you closed apps if you’d had Task Manager open. blogs.windows.com
  5. 5. Fixed an underlying issue which was causing the bottom half of secondary monitors to be unusable sometimes in recent builds (app windows wouldn’t maximize to that area). blogs.windows.com
  6. 6. Fixed an explorer.exe crash which was happening for some Insiders recently when dragging windows. blogs.windows.com
  7. 7. We are beginning to roll this out to Windows Insiders in the Canary Channel today, so the experience isn’t available to all Insiders just yet. blogs.windows.com
  8. 8. The build watermark at the lower right-hand corner of the desktop is not present in this build and will return in future Insider Preview builds. blogs.windows.com
  9. 9. You can ask Copilot in Windows (in preview) for help ten times when you sign in to Windows using a local account. blogs.windows.com
  10. 10. The redesigned version of the Delivery Optimization settings page under Settings > Windows Update > Advanced options > Delivery Optimization that was first introduced in Build 25987 has been reverted to the previous design starting with Build 26085. blogs.windows.com
  11. 11. During the times in which the Canary and Dev Channels are on the same builds (e.g. Build 26090), the window is open for Insiders in the Canary Channel to switch to the Dev Channel. blogs.windows.com
  12. 12. Administrators can now disable the SMB over QUIC client with Group Policy and PowerShell. blogs.windows.com
  13. 13. Successful SMB over QUIC client connection events are now written to the event log to include the QUIC transport. blogs.windows.com
  14. 14. Administrators can now enable auditing of the SMB server and client for support of SMB signing and encryption. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 14 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 3/5, clarity 4/5, completeness 3/5. 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