"The next annual update for Windows 11 is coming soon and is already available to Windows Insiders!," announced Microsoft.
Microsoft begins Dev Channel testing for Windows 11 version 26H2
Microsoft has confirmed that Windows 11 version 26H2 will be the next feature update and that the company has begun testing it with Windows Insiders in the Dev Channel. The announcement frames 26H2 as the next annual update and part of a continuing focus on "delivering a predictable, low-disruption update experience for organizations and IT professionals," according to Microsoft.
Enablement package vs full upgrade: 174 KB versus 6.5 GB
Devices running Windows 11 24H2 and 25H2 can move to 26H2 through a small enablement package (eKB), a mechanism Microsoft says requires only a quick restart. The enablement package is 174 KB and, when applied, activates dormant features already present on the device and changes the operating system's build number to 26300.
By contrast, systems running Windows 11 23H2 and older releases do not share the same servicing branch and therefore will require the full update. Microsoft says the full upgrade path requires a 6.5 GB download. The two paths — tiny eKB for recent H2 releases and a full-image download for older releases — are presented as distinct and deterministic in Microsoft's announcement.
Shared servicing model explained in Microsoft's whitepaper
In a coordinated release, Microsoft published a whitepaper detailing its shared servicing model and confirmed that Windows 11 versions 24H2, 25H2, and 26H2 all share the same servicing branch. Because these releases share the same underlying source code, security updates, and testing baseline, Microsoft can deliver the 26H2 upgrade as an enablement package that simply flips on features already present on the device.
Microsoft's explanation centers on the concept that sharing a servicing branch and baseline reduces the need for larger, disruptive replacements of system components — an engineering rationale that underpins the small eKB delivery mechanism for qualifying devices.
Timing, naming, and hardware requirements
Releases with an "H2" designation are typically launched during the second half of the year, and Microsoft has not yet announced when Windows 11 26H2 will become generally available. The company also has not announced any changes to Windows 11's hardware requirements as part of the 26H2 release. Microsoft notes that previous H2 updates were released in the fall, but offers no specific date for 26H2's general availability.
What this means for IT teams, enterprises, and end users
- IT teams and technologists: Expect an easier, lower-bandwidth path to 26H2 for devices already on 24H2 or 25H2; the enablement package approach requires planning around staging and restart windows rather than large downloads.
- Enterprises and procurement leaders: Devices still on 23H2 or older will need the full 6.5 GB upgrade — an outcome that affects bandwidth planning and imaging strategies for large fleets.
- End users: For those on 24H2 or 25H2, the upgrade experience is designed to be quick and low-disruption; users on older releases should anticipate a larger download and a more substantial update process.
Microsoft's dual-path approach — a tiny enablement package for recent H2 releases and a full download for older releases — makes the mechanics of this year's update explicit: if your device already shares the 24H2/25H2 servicing branch, Microsoft intends to flip a switch; otherwise, you'll need to pull a full image. The company has started testing with Insiders, has documented the shared servicing model, and has left general availability timing and hardware-requirements changes unannounced.
Read the original announcement at BleepingComputer.
