Insider KB5124192 Windows 11 Insider Experimental (26H1) build 28120.3151 - Oct. 2

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.

[Windows Magnifier]​

• Magnifier now gives you more control over how you zoom. You can type an exact zoom percentage directly in the Magnifier toolbar to land on precisely the level you need.
  
  
  

  Change Magnifier Zoom Level in Windows 11

  This tutorial will show you how to change the zoom level of Magnifier for your account in Windows 11. Magnifier makes part or all of your screen bigger so you can see words and images better. You can change the Magnifier zoom level to choose how much Magnifier enlarges the screen when turned...

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• We've also added preset step increments (5%, 10%, 25%, 50%, 100%, 150%, 200%, and 400%) to the Settings dropdown, so you can jump to common levels in a single click. Whether you need a subtle boost or a dramatic close-up, Magnifier adapts to how you want to zoom.
  
  
  

  Change Magnifier Zoom Increment in Windows 11

  This tutorial will show you how to change the zoom increment of Magnifier for your account in Windows 11. Magnifier makes part or all of your screen bigger so you can see words and images better. You can change the Magnifier zoom increment to choose how much the screen enlargement level...

  www.elevenforum.com
  
  
  Enter an exact percentage or jump to preset steps - 5% up to 400%.

[Cloud rebuild]​

• We're updating Cloud rebuild, the recovery option that restores a Windows 11 PC to a clean, known-good state by performing a full OS reinstall, with two additions.
• Cloud rebuild can now sanitize the device's drives as part of the rebuild. When you start a rebuild in WinRE, choose Remove files if you're keeping the PC, or Remove & sanitize files before recycling, returning, or reassigning it. The sanitize option uses the storage hardware's erase capability to securely erase data before Windows is reinstalled and is irreversible.
• IT administrators can now configure and start a Cloud rebuild remotely through the Recovery CSP, using either the currently installed build or a target build you specify.
  
  
  

  Cloud Rebuild Windows 11

  This tutorial will show you how to use Cloud rebuild to perform a full clean reinstall of Windows 11 from Windows Recovery (WinRE). Starting with Windows 11 build 26300.8772 (Experimental 26H2), build 26220.9343 (Beta 25H2), and build 28120.3032 (Experimental 26H1) for Insiders, Microsoft is...

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  UI showing new Cloud rebuild file removal options.

[File Explorer]​

• Customizations
  • Improved File Explorer to keep folder view customizations, such as sorting and icon size preferences, consistent across different access paths and apps.
• Address bar improvements
  • The address bar now supports paths containing double backslashes and quotation marks, for example, C:\Users\user or "C:\Users\user", improving compatibility with a wider range of inputs.
  • Improved reliability of the address bar suggestion dropdown so it now consistently closes after an item is selected.
• Refinements to the rename experience
  • Fixed an issue where text would be repeatedly selected while renaming items in folder views.
  • Fixed an issue where updated names with case-only changes weren't immediately reflected in folder views across local and cloud storage.

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

• These builds can be unstable and might 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 might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Windows 11 Insider Experimental (26H1) Preview Build 28120.3151 - Windows Insider Program

Release notes for Windows 11 Insider Experimental (26H1) Preview Build 28120.3151

learn.microsoft.com

Announcing new builds for 2 October 2026

Hello Windows Insiders, Today, we’re releasing new Windows 11 Insider Preview builds to the Beta and Experimental channels. New builds this week Select your channel below to view its release notes: Beta:

blogs.windows.com

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UUP Dump - Download Windows Insider ISO

UUP Dump is the most practical and easy way to get ISO images of any Insider Windows 10 or Windows 11 version, as soon as Microsoft has released a new build. UUP Dump creates a download configuration file according to your choices, downloads necessary files directly from Microsoft servers, and...

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