Insider KB5102951 Windows 11 Insider Experimental (26H1) build 28120.2387 - July 6



 Windows Insider Blog:

As a reminder, these release notes apply to those who are in the Experimental (26H1) channel.

Changes and improvements gradually being rolled out

  • This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.

[Taskbar]​

  • Alternate Taskbar Position
    • You can now change the position of taskbar on your screen. In Settings > Personalization > Taskbar > Taskbar Behaviors, you can select the side of the screen you want your taskbar on: bottom, top, left, or right. In these other positions, tooltips, flyouts, and animations will still come from the taskbar, and most customization settings like small taskbar and never combine taskbar icons will work with all locations.
    • Support for touch gestures, Search box, and Ask Copilot in alternate locations is in progress. Auto-hidden taskbar and touch optimized taskbar are not yet supported.


      Screenshot of the taskbar in the left-aligned position.

      Screenshot of the taskbar in the left-aligned position.
  • Smaller Taskbar
    • We're introducing a smaller taskbar for users who want to maximize screen space, especially on smaller devices. While the default taskbar remains unchanged, this setting provides a more compact experience with smaller icons and a reduced taskbar height, giving you more room for your apps. Core elements like Start, Search, and the system tray scale appropriately to stay aligned and consistent.
    • To change your taskbar size, go to Settings > Personalization > Taskbar > Taskbar behaviors > Show smaller taskbar buttons. When set to Always, both the icons and the taskbar height become smaller.


      Screenshot that shows side-by-side comparison of the standard and smaller taskbar heights on the same device and resolution, showing the additional screen space gained.

      Side-by-side comparison of the standard and smaller taskbar heights on the same device and resolution, showing the additional screen space gained.
  • We're also working on improving taskbar settings to make resizing easier; these enhancements are currently in progress.
Feedback: Share your thoughts in Feedback Hub (WIN + F) under Desktop Environment > Taskbar.

See the in-depth blog for more information about Taskbar improvements.

[EDU]​

  • Free upgrade path to Windows 11 Pro Education for K-12.
  • Windows Insiders in K-12 education environments can now experience a seamless upgrade path from Windows 11 Home to Windows 11 Pro Education edition, at no additional cost. This enables educational organizations to procure Windows 11 Home devices, upgrade them to Windows 11 Pro Education, and bring devices under school management.
  • To get started:
    • Sign in to the device using a local account.
    • Launch an elevated Command Prompt and initiate the upgrade by running Clipupgrade.exe.
    • Sign in with your K-12 organization account to validate eligibility.
    • The device prepares the upgrade and completes after a restart.
  • This upgrade is one-way only. Reverting to Windows Home is not supported without a clean OS reinstall.
Feedback: Share your thoughts in Feedback Hub (WIN + F) under Windows Installation.

[File Explorer]​

  • Fixed an issue where the OneDrive shortcut in File Explorer stops working when File Explorer is run in administrative mode.

[Other]​

  • If you were having issues with Outlook not responding to the close button last week, that should be addressed now.

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


UUP Dump:
64-bit ISO download:

ARM64 ISO download:

 
Last edited:
Downloading and installing.
1783388623520.webp

Done:

Edition Windows 11 Pro Insider Preview
Version 26H1
Installed on ‎6/‎8/‎2026
Evaluation expires on ‎8/‎11/‎2026 11:09 AM
OS build 28120.2387
Experience Windows Feature Experience Pack 1000.26100.398.0
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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 usual files found by SFC /SCANNOW. 😵‍💫🤷‍♂️

1783389619036.webp


2026-07-06 18:55:50, Info DEPLOY [Pnp] Corrupt file: C:\WINDOWS\System32\drivers\BthA2dp.sys
2026-07-06 18:55:50, Info DEPLOY [Pnp] Repaired file: C:\WINDOWS\System32\drivers\BthA2dp.sys
2026-07-06 18:55:50, Info DEPLOY [Pnp] Corrupt file: C:\WINDOWS\System32\drivers\BthHfEnum.sys
2026-07-06 18:55:50, Info DEPLOY [Pnp] Repaired file: C:\WINDOWS\System32\drivers\BthHfEnum.sys
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
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