Microsoft launched a dedicated Beta channel for Windows 11 version 26H1 on June 8, 2026. If you run Windows 11 on a Snapdragon X2 or RTX Spark device, you can now choose between Beta and Experimental testing tracks without wiping your PC.
This guide explains what changed, what Windows 11 26H1 actually is, and exactly how to switch channels.
What Is Windows 11 26H1
Windows 11 version 26H1 is not a standard feature update like 24H2 or 25H2. Microsoft built it as a targeted platform release designed specifically to support new silicon launching later in 2026, including Qualcomm Snapdragon X2 processors and NVIDIA RTX Spark-powered devices such as the Surface Laptop Ultra and the Surface RTX Spark Dev Box.
It will not roll out as a general update to existing Windows 11 users. The only official way to get it is by purchasing a new device built on that hardware. That said, Windows Insiders can manually select it under Advanced Options in the Insider settings if they want to test it on an existing machine, though Microsoft does not recommend doing so.
Until today, version 26H1 only had an Experimental channel. Beta testing was unavailable for it, which meant anyone running 26H1 had no stable preview path. That changes with today’s announcement.
Windows 11 26H1 Beta Channel: What Microsoft Changed
Microsoft now runs two separate build trains for Windows 11 26H1 inside the Windows Insider Program:
- Beta (26H1): Uses the 28000 build series. Features here are further along in development and committed to ship in an upcoming release.
- Experimental (26H1): Uses the new 28100 build series. Features here are earlier in development, less stable, and subject to change or cancellation.
Before June 8, both Beta and Experimental 26H1 Insiders received builds from the same branch. Now they diverge into separate tracks with distinct build numbers and different levels of stability.
Microsoft’s stated goal is to give Windows 11 26H1 Insiders the same choice between Beta and Experimental branches that already exists for version 25H2.
Beta vs Experimental Channel: Key Differences
| Feature | Beta | Experimental |
|---|---|---|
| Build series (26H1) | 28000 | 28100 |
| Feature stability | Higher, closer to release | Lower, early development |
| Feature rollouts | No gradual rollouts | Gradual CFR rollouts apply |
| Feature flags | Not available | Available via Settings |
| Recommended for | Stable preview testing | Early access and feedback |
The Experimental channel still uses Controlled Feature Rollout (CFR), meaning you may not receive every announced feature immediately. The Beta channel ended gradual rollouts, so when Microsoft announces a feature in a Beta update, you get it after installing that update.
How to Switch to the Windows 11 26H1 Beta Channel
You do not need to reinstall Windows to switch between Beta and Experimental on 26H1. Microsoft uses an in-place upgrade (IPU) to move you between channels. It takes longer than a regular update but keeps your apps, settings, and files intact.
Follow these steps:
- Open Settings on your Windows 11 device.
- Go to Windows Update.
- Click Windows Insider Program.
- Under the channel selector, switch the experience from Experimental (26H1) to Beta (26H1).
- Confirm the change. Windows will prompt you to restart and begin the in-place upgrade process.
After the upgrade completes, your device will receive 28000 series builds going forward.
To switch back to Experimental, follow the same steps and select Experimental (26H1). The switch works in both directions without a clean install.
Note: Switching between 26H1 and 25H2 channels, or moving to Future Platforms builds (29500 series), still requires a clean installation. The IPU path only works within the same Windows core version.
How to Leave the Windows Insider Program Without a Clean Install
Microsoft also improved the process for exiting the Insider Program entirely. In most cases, you can now leave Beta or Experimental (on a standard Windows core version) using an in-place upgrade rather than a full wipe.
To leave the program:
- Go to Settings > Windows Update > Windows Insider Program.
- Select Stop getting preview builds.
- Choose to unenroll your device.
- Windows will schedule an IPU to move you to a stable release build.
The exception is Future Platforms (Canary 29500 series). Because those builds do not align to any retail version of Windows, leaving that track still requires a clean install.
New Windows 11 Insider Builds Released June 8, 2026
Microsoft released several new builds alongside the channel announcement. Here is a full breakdown:
Beta Channel: Build 26220.8575 (Windows 11 25H2)
This build includes several fixes and one notable new feature:
- Windows Update: You can now extend update pauses as many times as you need, removing the previous limit on how long you could defer updates.
- Audio: Fixed a bug where audio stopped working for some Insiders after recent flights.
- Settings: Fixed a reliability issue in Settings > Apps > Installed Apps introduced by recent flights.
- General: Resolved freezes triggered by interacting with Search, Notepad, and other apps in the previous flight.
Beta (26H1): Build 28020.2236
This build contains general improvements and fixes. No specific feature changes were announced beyond the channel split itself.
Experimental (26H1): Build 28120.2242
This build also contains general improvements and fixes, plus one security addition covered below.
Experimental Channel (25H2)
No new build this week.
Administrator Protection Now Easier to Enable
Starting with build 28120.2242 in the Experimental (26H1) channel, Microsoft expanded the rollout of Administrator Protection. You can now enable it directly from the Settings app instead of only through Group Policy or IT admin configuration.
To turn it on:
- Open Settings.
- Go to Privacy & Security > Windows Security > Account Protection.
- Toggle Administrator Protection to on.
- Restart your device when prompted.
Administrator Protection adds an extra layer of security by requiring explicit approval when apps attempt to use administrator-level access, even on accounts with admin rights.
What This Means for 26H1 Insiders
The addition of a Beta channel for 26H1 completes the testing structure Microsoft outlined when it restructured the Windows Insider Program in April 2026. At that time, Microsoft announced cleaner channel definitions, the end of gradual rollouts in Beta, and the introduction of feature flags for Experimental users.
Now both 25H2 and 26H1 share the same two-channel structure. If you own or plan to buy a Snapdragon X2 or RTX Spark device, you can join the Windows 11 26H1 Beta channel and get a more predictable preview experience than Experimental offers.
For most Insiders on existing hardware, the default 25H2 build series remains the right choice. The 26H1 channel targets next-generation hardware and does not add user-facing features beyond what 25H2 already includes.
