Microsoft is rolling out a fresh wave of Windows 11 Insider Preview builds for May 1, 2026, and this round is all about polish, flexibility, and giving testers more control over how they install and use preview builds. Alongside new builds for the Beta and Experimental channels, the company is expanding its revamped Windows 11 Insider experience to more Canary devices, extending ISO availability, and shipping updates to the Run dialog, Feedback Hub, and Widgets.
In a new Windows Insider blog post titled “Announcing new builds for 1 May 2026 and extending ISO support,” Stephen Lines and the Windows Insider Program team outline the latest changes and how they fit into the broader reboot of the Windows 11 Insider program and its new Experimental and Beta channel structure. The key message: Microsoft wants it to be easier to get onto the right build, easier to understand what’s new, and easier to give feedback on the features you care about.
New Windows 11 Insider experience expands to Canary 28000 series
Today’s announcement also marks the next step in Microsoft’s ongoing rollout of the new Windows 11 Insider experience and channel structure. The company is now expanding those changes to Canary Channel devices on the 28000 series, which will begin moving to the Experimental (26H1) channel over time. Importantly, this shift does not change your current Windows version—it simply aligns those devices with the updated channel model and Windows 11 Insider experience.
The new channel system, first announced in April, reorients the program around Experimental and Beta tracks and introduces feature flags so Windows 11 Insiders can opt into specific experiences. As Microsoft continues that transition, Lines reminds Windows 11 Insiders that they can always check their build number in the desktop watermark in the bottom‑right corner to confirm exactly which build and channel they’re on. Release notes for each build are now organized by the new channels, even if your PC hasn’t been moved yet, which should make it easier to track changes while the migration is in progress.
ISO support extended across Beta and Experimental builds
One of the most requested changes from Windows Insiders has been better ISO support for preview builds. Many testers rely on ISO images to clean‑install new builds on test machines, spin up virtual machines, or keep a known‑good installer handy for lab work and reviews. In response, Microsoft is now committing to releasing ISOs alongside regularly scheduled builds across all versions of both the Beta and Experimental channels.
That means if you prefer installing preview builds via ISO rather than in‑place upgrades, you’ll have a more consistent and predictable flow of images to work with. As usual, the downloads will be available on the Windows Insider Preview Downloads page, which requires you to be signed in with a registered Insider account. For power users, admins, and reviewers, this change should make it significantly easier to manage multi‑device test environments and keep them aligned with the latest preview bits.
Today’s builds: Beta and multiple Experimental flavors
On the build side, Microsoft is publishing several new Windows 11 Insider Preview builds across the updated channel system. For most users, the headline releases are:
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Beta (including the Beta Channel): Build 26220.8340
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Experimental (including the Dev Channel): Build 26300.8346
For Canary users being aligned to the new Experimental flavors, Microsoft is also releasing:
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Experimental (26H1) – including Canary 28000 series: Build 28020.1921
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Experimental (Future Platforms) – including Canary 29500 series: Build 29580.1000
Lines reiterates that all Insiders can find the release notes appropriate for their device based on the new channel system, even if the channel rename hasn’t fully landed in Settings yet. This is part of the broader push to make release information easier to track as the program transitions from the old Dev/Beta naming to Experimental and the refreshed Beta.
Modern Run dialog rolls out as an opt‑in feature
One of the most visible user‑facing changes in this wave is the refreshed Run dialog, which Microsoft is now rolling out to Insiders in the Experimental channel. The new design brings a cleaner interface that aligns with Windows 11’s Fluent Design language, adds dark mode support, and introduces new controls that let you manage the experience directly from Settings.
To enable the modern Run dialog, you’ll need to be on the Experimental channel and then go to Settings > System > Advanced, where you’ll find a “Run Dialog” toggle at the top of the page. Once switched on, Win+R will open the refreshed experience instead of the legacy dialog. Microsoft has a separate deep‑dive on the change in a dedicated dev blog post titled “The new Run dialog: faster, cleaner, and more capable,” which breaks down its C#/WinUI 3 foundation, performance gains, and PowerToys Command Palette roots.
Feedback Hub gets reliability and translation upgrades
The Feedback Hub is also getting an update in these builds, rolling out as version 2.2604.301.0 across multiple Experimental variants, including Experimental, Experimental (26H1), and Experimental (Future Platforms). Microsoft says this update includes a series of reliability improvements plus additional design, accessibility, and localization polish to make the app more consistent and easier to use.
There are also a few notable quality‑of‑life changes aimed at global Insiders and heavy Feedback Hub users:
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The Community feedback section in non‑English locales now lets you switch the view to English if you prefer.
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Collection titles and official responses will be automatically translated into top languages, making it easier to follow along with global feedback threads.
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The file upload limit when submitting feedback has been restored to 500 MB, which is helpful for attaching logs, screenshots, and repro videos.
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Upvote and comment counts should now be more accurate, improving the signal on which issues matter most to the community.
As always, Microsoft encourages Insiders to keep filing feedback—now under Apps > Feedback Hub—so the team can continue tuning these tools.
Widgets are “quiet by default” in Experimental builds
Rounding out today’s highlights, Microsoft is continuing its recent work to make Widgets less distracting and more “calm” by default. In Experimental builds, Widgets is now being tested with a new default configuration designed to reduce unexpected alerts and visual interruptions on the desktop.
The new behavior includes:
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Disabling “Open on hover” by default, so the Widgets board no longer pops up just because your cursor passes over the taskbar icon.
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Turning off taskbar badging by default, cutting down on persistent badges that tug at your attention.
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Opening directly to the Widgets experience on first launch to give you a clear, focused starting point.
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Limiting taskbar alerts until you explicitly open and engage with Widgets, so it stays in the background unless you choose to interact with it.
If you prefer a more proactive experience with live badges and alerts, you can still re‑enable those behaviors from the Widgets settings. For everyone else, these changes should make the desktop feel noticeably calmer out of the box while still keeping Widgets a click away when you actually need it.
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