What's new in the Windows 11 Insider builds for 11 September 2026
- Windows 11, version 26H2
- Build 26340.9233
- Build 26300.9032
Priya Natarajan4 min readQuick answer
The latest Windows 11 Insider Preview releases for September 2026 introduce a redesigned WinUI AutoPlay experience, individual privacy permissions for desktop applications, and an automatic window maximization accessibility toggle. These updates also streamline lock screen widgets and expand inline message previews in the Start menu. Insiders in the Experimental channel can download builds such as Build 26340.9233 and Build 26300.9032 directly via Windows Update.
The latest Windows 11 Insider Preview releases for September 2026 bring a series of targeted user interface refinements, modernized system dialogs, and expanded privacy controls to testing devices. These builds, including Build 26340.9233 and Build 26300.9032 for Windows 11, version 26H2, offer tech enthusiasts and early adopters a detailed preview of features currently undergoing evaluation in the Experimental channel.
These updates affect registered members of the Windows Insider Program who run preview software on devices configured for Windows 11 version 26H2 builds. They matter because Microsoft is actively updating core operating system experiences, ranging from streamlined lock screen widget layouts to granular camera, microphone, and location permissions for classic desktop applications. Installing these builds allows you to test these capabilities early, submit feedback through Feedback Hub, and maintain device compatibility with renewed flight certificates.
Highlights
- Lock screen widgets: Weather is now designated as the primary lock screen widget to minimize recommended content and reduce visual clutter, configured via Settings > Personalization > Lock screen (introduced in Build 26340.9233).
- Modernized AutoPlay experience: The AutoPlay dialog for connected devices like phones, cameras, and removable drives is rebuilt with WinUI, supporting dark mode, text scaling, and docking notifications in the notification center (introduced in Build 26340.9233).
- Open apps maximized: A new accessibility feature automatically maximizes application windows as soon as they open, accessible via Settings > Accessibility > Visual effects (introduced in Build 26340.9233).
- Desktop app privacy controls: Individual desktop apps can now have their camera, microphone, and location permissions granted or denied individually via Settings > Privacy & security > Camera, Microphone, or Location (introduced in Build 26340.9233).
- File Explorer web preview: PDF and non-HTML files downloaded from the web can now be previewed automatically inside the File Explorer preview pane (introduced in Build 26340.9233).
- Phone Link Start menu preview: Hovering over recent notifications or messages in the Start menu Recent section shows an inline preview without requiring you to open the Phone Link app (introduced in Build 26300.9032).
- Expanded search indexing: Windows Search automatically broadens its indexing scope based on recent file activity and frequently accessed folders, managed via Settings > Privacy & security > Search (introduced in Build 26300.9032).
- Adaptive hibernate policy: System power management now optimizes Modern Standby resumes by hibernating less when battery charge is over 80% and hibernating earlier when battery drops below 10% (introduced in Build 26300.9032).
- Installed apps version display: Packaged apps in Settings > Apps > Installed apps now display their version number at the top level (introduced in Build 26340.9233).
Known issues
Microsoft reports no known issues for this update.
Should you install it?
If you are a tech enthusiast or tester who wants to experiment with WinUI interface updates, granular desktop app privacy permissions, and automated window controls, installing these Experimental builds is a great option. However, these builds are prerelease software and carry variable system stability and rough edges. If you rely on your PC for mission-critical work or require a guaranteed stable environment, you should wait for these features to reach general availability.
Because builds in the Experimental channel rely on Controlled Feature Rollout (CFR) technology, some announced features roll out gradually to subsets of users over time. These builds are optional preview updates delivered via enablement packages on Windows 11, version 26H2, meaning you can control when to download and test them on your secondary or dedicated testing devices.
How to get it
To download and install the latest Windows 11 Insider Preview builds through Windows Update, follow these steps:
- Open the Settings app on your Windows 11 device.
- Select Windows Update from the sidebar.
- Click on Windows Insider Program.
- Choose your Insider settings and select the Experimental channel radio button.
- Return to the main Windows Update screen in Settings.
- Click Check for updates to download Build 26340.9233 or Build 26300.9032.
- Restart your device after the installation completes to apply all updates.
If a specific feature announced for your build does not appear immediately due to Controlled Feature Rollout, you can check whether a manual toggle is available:
- Go to Settings > Windows Update > Windows Insider Program.
- Click on Feature flags.
- Toggle on any available flags for new features you wish to test manually.
Advanced users who prefer managing policy configurations on domain-joined devices can also configure updates using Group Policy or the Windows Registry, though editing system policies improperly can cause system instability, so proceed with caution. If you are attempting to search for stand-alone offline packages, note that Insider preview builds are delivered directly through the Windows Insider Update channel rather than standalone packages on the Microsoft Update Catalog.
Sources
Frequently asked questions
How do I turn on the Open apps maximized setting in Windows 11?
Go to Settings > Accessibility > Visual effects and turn on the Open apps maximized toggle switch. Introduced in Build 26340.9233, this feature automatically opens application windows in full screen.
How can I manage camera and microphone access for specific desktop apps?
Go to Settings > Privacy & security > Camera, Microphone, or Location to review and manage permissions for each individual desktop application. This capability was introduced in Build 26340.9233.
Where can I customize the lock screen widgets in Windows 11 Insider builds?
You can manage lock screen widgets by going to Settings > Personalization > Lock screen. Starting in Build 26340.9233, Weather is set as the primary lock screen widget to reduce visual clutter.
What should I do if a feature in Build 26340.9233 is missing on my PC?
Go to Settings > Windows Update > Windows Insider Program > Feature flags to see if you can manually turn on the feature. Because Microsoft uses Controlled Feature Rollout technology in the Experimental channel, features may gradually roll out to Insiders over time.
Checked against Microsoft's release notes on ; re-checked when a new build ships.
Writes Thea's how-to guides for new and changed Windows 11 features: where a setting moved, how to turn it on or off, and what it actually does. Every guide is checked against Microsoft's release notes and updated when a new build changes the steps.
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