Insider KB5089571 Windows 11 Insider Experimental (26H1) build 28020.2207 - May 29



 Windows Insider Blog:

As a reminder, these release notes apply to those who are in the Experimental (26H1) channel, formerly known as the Canary 28000 series Channel. As we begin the transition to the updated Windows Insider Program, all new build release notes will be labeled under the new channel names, even though Insiders in the Canary 28000 series Channel may not yet find themselves having transitioned to Experimental (26H1). See the Windows Insider Blog for more details.


Changes and improvements gradually being rolled out

  • This update includes a small number of minor bug fixes and improvements.

Reminder for Windows Insiders in the Experimental (26H1) channel

  • These builds can be unstable and may be released with limited documentation.
  • Many features in the Experimental (26H1) channel are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
  • The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
  • Some features in active development we preview with Windows Insiders may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.


 Source:



Check Windows Updates


ISO from Microsoft:



UUP Dump:

64-bit ISO download:

ARM64 ISO download:

 
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Downloading and installing.


1780075428878.webp

1780075482506.webp

Done:

Edition Windows 11 Pro Insider Preview
Version 26H1
Installed on ‎2/‎12/‎2026
Evaluation expires on ‎8/‎11/‎2026 11:09 AM
OS build 28020.2207
Experience Windows Feature Experience Pack 1000.26100.361.0
 
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My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Still shows old Dev channel here, no Experimental. 😵‍💫🤷‍♂️

1780077058648.webp
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
The problem with WinRE rebooting to the main OS instead of loading the recovery environment menus appears be fixed with Build 28020.2207 on May 29, 2026.
It skips the "Choose keyboard layout" menu but gets to the other menus correctly. 🤞🤷‍♂️

 
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My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Not many of us on this one. Runs good for unsupported PC
 

My Computer

System One

  • OS
    Win 11 Insider Release Preview and Beta channels.
    Computer type
    Laptop
    Manufacturer/Model
    HP ENVY Bought: March 2017
    CPU
    i5 Core [email protected] (Unsupported for Win 11)
    Motherboard
    HP 81AD (U3E1)
    Memory
    12GB
    Graphics Card(s)
    Generic PnP Monitor (1920x1080@60Hz) Intel HD Graphics 620 (HP)
    Sound Card
    Conexant ISST audio
    Monitor(s) Displays
    Generic PnP Monitor
    Screen Resolution
    1536x864 pixels
    Hard Drives
    HGST HTS721010A9E630
    PSU
    Well...PSU you too!! What's this mean?
    Case
    HP ENVY SILVER
    Cooling
    A fan.
    Keyboard
    USA
    Mouse
    Logitec Anywhere 2
    Internet Speed
    Good enough for me! Fast!
    Browser
    Edge/Waterfox
    Antivirus
    Windows Defender
    Other Info
    No 'mo.

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