Windows Insider Program Adds New Beta (26H1) Channel

Microsoft’s efforts to simplify the Windows Insider Program with clearer channel definitions seem to be disrupted by the confusing release of Windows 11 version 26H1. This new version of the OS, which will only ship on new devices powered by new ARM silicon, is now available for testing across three different Insider Channels.

On May 19, Microsoft released the 26H1 build 28000.2176 on the Release Preview Channel, but it’s an optional update. Insiders on this Channel can stay on the 24H2/25H2 bandwagon, which is probably recommended, as Windows 11 version 26H1 won’t be able to update to the next annual feature update (26H2) in the second half of 2026. “These devices will have a path to update in a future Windows release,” Microsoft previously explained.

Windows 11 version 26H1 is also available for testing on the new Experimental (26H1) Channel, which received the build 28120.2242 yesterday. This Channel just transitioned from 28000 series builds to 28100 series builds, and the 26H1 build 28120.2242 released yesterday just introduces the ability to enable Administrator Protection in Settings.

The Beta Channel, however, is now getting an optional upgrade path with the new Beta (26H1) channel. This new Channel will receive 28000 series builds, just like the Experimental (26H1) Channel until yesterday.

The optional 26H1 build 28020.2236 released on the Beta Channel yesterday only includes minor fixes. Insiders on this Channel can still stay on the 25H2 bandwagon and get the 25H2 build 26220.8575, which was also released yesterday. This one adds the ability to extend update pauses as many times as needed.

The big change that was announced yesterday is that Insiders on the Experimental (26H1) Channel, which are now receiving 28100 series builds, can now switch to the new Beta (26H1), which is now receiving 28000 series builds, and vice versa. And they can do so without doing a clean install.

“This enables our goal of giving Windows 11 26H1 Insiders the same choice between Beta and Experimental development branches, with the associated differences outlined in our original blog announcing the program changes,” the Windows Insider team explained. “This entails a simple in place upgrade (IPU), meaning no clean reinstallation of Windows is required.”

In case you’re wondering, Microsoft didn’t release new builds yesterday for the Experimental (previously Dev Channel) and the new “Experimental (Future Platforms)” Channel. The latter used to be the alternative Canary Channel receiving 29500 series builds.

Overall, I think this new Insider Channel system is way too complicated, even for the average Windows enthusiast. There are now two flavors of the Release Preview Channel, two versions of the Beta Channel, and three separate Experimental Channels. Microsoft has a habit of overcomplicating things and using complex naming schemes, so we probably shouldn’t be too surprised.