Microsoft has announced Windows 11 26H1, but it's not for existing PCs. Instead, it will ship on devices with Snapdragon X2 processors and possibly other rumored ARM chips.

Microsoft insists Windows 11 is still following an annual update cadence, which means Windows 11 26H2 is likely on track.

According to Microsoft, Windows 11 26H1 is based on a new platform release to support the upcoming ARM chips.

In a press release, Microsoft says it worked with OEMs and IHVs to support new device innovations and development via a new Windows Update.

"That means that this release is not being made available through broad channels but is only intended for those who purchase these new devices. At this time, devices with Qualcomm Snapdragon® X2 Series processors will come with Windows 11, version 26H1," Microsoft noted.

"Organizations should continue to purchase, deploy, and manage devices running broadly released versions of Windows 11 (e.g. versions 24H2 and 25H2) with confidence."

Microsoft also has an FAQ that clarifies version 26H1 is not a feature update for version 25H2, and that "there is no need to pause device purchases or OS deployments, and no changes are required to existing enterprise rollout plans."

Devices running Windows 11 26H1 won't get specific new features, as changes will be shared across platform releases, but version 26H1 should offer better performance or battery life on new ARM PCs.

All other PCs should get Windows 11 26H2 later this year, but Microsoft hasn't confirmed the fall release yet.