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Guide · Lifecycles, LTSC & Insider Flighting channels Windows Insider

Windows Insider channels, explained

What the Experimental, Beta and Release Preview channels are, how their build numbers relate to Windows 11 versions, and how to stop receiving preview builds without reinstalling.

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The Windows Insider Program gives volunteers early versions of Windows 11, called Insider Preview builds. Their features can change or never ship, so they belong on a test PC. The program was simplified in 2026: Experimental replaced the old Dev and Canary channels, and Beta and Release Preview remain. Older articles still use the old names. Each build has its own page in Windows Insider.

The channels

Channel For whom What you get
Experimental Enthusiasts New features first; they may change, be delayed or never ship. Many arrive through gradual rollout, and a Feature flags page lets you switch them on yourself.
Beta Early adopters and IT pros What Microsoft plans to ship in the coming weeks, with no gradual rollout: if a feature is announced and you install the build, you have it.
Release Preview Commercial customers and cautious Insiders The upcoming update just before its broad release. You turn it on under Advanced options.

Experimental also has a Future Platforms option, the earliest builds, not tied to any retail release.

Build numbers and Windows versions

The first digits of a build tell you which Windows core it belongs to:

Build series Core
26100 (26120 in Beta) Windows 11 24H2
26200 (26220 in Beta) Windows 11 25H2
26300 (26340 in Experimental) Windows 11 26H2
28000 (28020 Beta, 28120 Experimental) Windows 11 26H1, for new devices with specific hardware
29xxx Future Platforms

The higher number in each pair is an enablement package applied on top of the retail build (see enablement packages). Check your own build in Settings › System › About or with winver.

Changing channel or leaving the program

Within the same core, you can switch between Experimental, Beta and Release Preview in Settings › Windows Update › Windows Insider Program › Choose your Insider settings. This is an in-place upgrade that keeps your apps and data. Moving out of Future Platforms, or from the 26H1 core back to 25H2 or 26H2, needs a clean installation, because those cores are a higher development version than the retail ones.

To stop getting preview builds:

  1. Open Settings › Windows Update › Windows Insider Program › Stop Insider Preview Builds.
  2. On Beta, Experimental or Release Preview, turn the switch on. The device returns to a retail build and no reinstall is needed.
  3. On Future Platforms, back up your files and do a clean install of Windows 11.

Leaving the program entirely, to stop the Insider emails too, is a separate step on Microsoft's troubleshooting page. If a build goes wrong, Settings › System › Recovery can go back to the previous version for up to 10 days.

Keep in mind

  • Insider builds expire, so keep updating. A device left on an old build can become stuck and need a clean install.
  • Windows must be activated, and the PC must run Windows 11.
  • For regular updates see Windows 11; for terms, the glossary.

Sources

Edited by the site editor. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake