What's new in the Windows 11 Insider builds for 2 October 2026
- Build 26340.9233
- Build 26300.9032
- Windows 11, version 26H2
Priya Natarajan4 min readQuick answer
The latest Windows 11 Insider preview builds for October 2026 deliver major feature updates to the Experimental channel, including Build 26340.9233 and Build 26300.9032. Key updates include per-app privacy controls for desktop apps, a modernized WinUI AutoPlay interface with dark mode support, and a focused Weather lock screen widget view. Insiders also gain an accessibility option to automatically open apps maximized and direct notification previews in the Start menu via Phone Link.
Microsoft continues to flight preview builds to Windows Insiders in the Experimental channel, testing brand-new interface modernizations and system controls built on Windows 11, version 26H2. These builds—highlighted by Build 26340.9233 and Build 26300.9032—focus heavily on giving users granular control over system privacy, accessibility, desktop workflows, and battery management. Whether you are a tech enthusiast evaluating early features or a power user tweaking your workspace, these updates offer an exciting look at where Windows 11 is heading.
For devices enrolled in the Experimental channel, these changes are delivered through enablement packages via Windows Update. Alongside visual enhancements to the Start menu, Settings, and File Explorer, these builds also include critical flight certificate renewals to ensure your device remains on supported preview builds. Below is a detailed breakdown of all the new features, fixes, and installation steps for this update.
Highlights
- Per-app desktop privacy permissions: You can now control camera, microphone, and location access for individual desktop applications rather than relying on a single device-wide switch. Manage these by going to Settings > Privacy & security > Camera, Microphone, or Location to allow or deny permissions per app.
- Modernized AutoPlay dialog: Rebuilt with WinUI, the AutoPlay prompt for connected devices like phones, cameras, and removable drives now supports dark mode, scales better with display settings, and docks notifications directly in the notification center.
- Open apps maximized accessibility setting: Introduced in Build 26340.9233, a new accessibility setting automatically launches app windows in full screen. You can turn this on by going to Settings > Accessibility > Visual effects and enabling Open apps maximized.
- Focused lock screen widgets: Weather is now set as the primary lock screen widget to reduce visual clutter. To personalize which widgets appear on your lock screen, go to Settings > Personalization > Lock screen.
- Phone Link previews in Start: Insiders running Phone Link build 1.26021.3.0 or higher can hover over recent messages or notifications in the Start menu's Recent section to preview content without opening the app or unlocking their phone. Manage this under Phone Link > Settings > Start menu personalization.
- File Explorer preview pane upgrades: Web-downloaded PDF and non-HTML files now automatically display previews in File Explorer's preview pane. Additionally, File Explorer Home now saves whether sections were left expanded or collapsed.
- Adaptive hibernate battery policy: Adjustments to power policy reduce hibernation triggers when your battery is above 80% to keep instant-on resumes quick, while forcing earlier hibernation below 10% battery to prevent power drain.
- Settings search improvements: Search within Settings now surfaces results from broader configuration pages and utilizes improved ranking so relevant options appear higher in search results.
- Flight certificate renewal: Build 26300.9032 and Build 26340.9233 include renewed Insider flight certificates to replace the certificate that expired on August 11, 2026, ensuring continued update eligibility.
Known issues
Microsoft reports no known issues for this update.
Should you install it?
If you enjoy testing early features and want access to new privacy controls, full-screen app automation, and modernized interface elements, installing Build 26340.9233 or Build 26300.9032 is worthwhile. These builds offer valuable quality-of-life enhancements for Windows 11, version 26H2, particularly for users who frequently adjust app permissions or rely on accessibility tools.
However, because these builds are served in the Experimental channel via Controlled Feature Rollout (CFR) technology, stability can be variable, and some features may roll out gradually across devices. A desktop watermark is normal for these preview builds, and some experimental features may not be fully localized yet. If you require a completely stable operating system for daily production work, we recommend staying on the Beta channel or Release Preview branch instead.
How to get it
Illustration: the Windows Update page in Windows 11 Settings
If your computer is already registered in the Windows Insider Program, updating to the latest Experimental build takes just a few clicks through Windows Update:
- Press Windows key + I to open Settings, then click on Windows Update.
- Select Windows Insider Program to check your active channel selection.
- Click Check for updates to fetch Build 26340.9233 or Build 26300.9032.
- Click Restart now once the enablement package finishes downloading.
If you installed the update but do not see a specific advertised feature right away, go to Settings > Windows Update > Windows Insider Program > Feature flags to check if you can toggle the feature flag on manually. To switch between channels on the same Windows core version (version 26H2), navigate to Settings > Windows Update > Windows Insider Program > Choose your Insider settings and select your target channel. Keep in mind that moving off the Future Platforms core build requires performing a clean reinstall of Windows 11.
Sources
Frequently asked questions
What Windows core version are these October 2026 Insider builds based on?
These Experimental channel preview builds (Build 26340.9233 and Build 26300.9032) are based on Windows 11, version 26H2 delivered via an enablement package.
How do I enable the new Open apps maximized setting?
To enable this accessibility feature, go to Settings > Accessibility > Visual effects and turn on the toggle for Open apps maximized.
Why can't I see all the new features immediately after updating?
Many features in the Experimental channel use Controlled Feature Rollout (CFR) technology, meaning they reach Insiders gradually. You can check Settings > Windows Update > Windows Insider Program > Feature flags to toggle available features manually.
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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