Microsoft has announced Windows 11 26H1, a special version of the operating system designed exclusively for new PCs equipped with Qualcomm's Snapdragon X2 Elite chips. Unlike previous updates, this release will not be available to existing Windows 11 devices, which will remain on versions 24H2 or 25H2. The move highlights Microsoft's ongoing focus on Arm-based processors.
Windows 11, released in the fall of 2021, follows an annual feature update schedule in the second half of each year. The current supported versions are 24H2, released in fall 2024, and 25H2, from fall 2025. This week, Microsoft detailed Windows 11 26H1, described as a “scoped” release intended solely for new PCs starting with those using Qualcomm’s Snapdragon X2 Elite chips.
According to Microsoft's support page, 26H1 will not roll out to other Windows 11 PCs. Devices on 24H2 or 25H2 will never receive an upgrade to this version, though Windows Insider Program testers in the Canary channel can install it on other machines. Build numbers for 26H1 begin at 28000, differing from 26100 for 24H2 and 26200 for 25H2.
Users of PCs shipping with 26H1 will not be able to upgrade to the next major release, expected this fall as Windows 11 26H2. Microsoft plans an eventual update to align all versions, though no timeline is specified beyond the March 2028 end of security support for 26H1 Home and Pro editions.
For most users, differences between versions should remain invisible, as 26H1 will receive the same monthly security, quality, and feature updates as 24H2 and 25H2. However, app developers and IT professionals may need to test against this new version alongside others.
This release underscores Microsoft's commitment to Arm processors after years of x86 dominance. The 24H2 update marked a milestone for Arm PCs, introducing changes to the compiler, kernel, and scheduler, plus the Prism x86-to-Arm translation layer for better app compatibility. It aligned with the launch of Qualcomm's Snapdragon X-series chips, and many apps now have Arm-native versions.
Since mid-2024, new Surface PCs have exclusively used Qualcomm processors, shifting from previous Intel and AMD priorities. Arm versions have received features like Recall and Click To Do earlier than x86 counterparts, with development proceeding at slightly different paces.
