Windows 11 26H2 looks like it could be hours away, with the public rollout possibly beginning today. If there’s a delay, October 6 is another possible date, as Windows feature updates usually release on Tuesdays. Microsoft hasn’t confirmed either date, but ESDs (installation files) for Windows 11 26H2 have now appeared, and they point to an imminent release.
As spotted by Windows Latest, Windows 11 26H2’s ESD files are now available on Microsoft’s servers, and they carry Build 26300.9457. This could be the Build that will install with the Windows 11 2026 Update.
What are ESDs, and what do they have to do with Windows 11 26H2 ISOs?
For those unaware, ESD stands for “Electronic Software Distribution,” and it contains Windows installation images in a compressed form. When you use Microsoft’s Media Creation Tool to create a Windows installation USB or an ISO, you’re downloading ESDs, which power the entire process.
ESDs aren’t normally offered as direct downloads on the consumer Windows 11 download page. Most people will never need to download or convert one manually.
“When a version of Windows is ready to be released, the final code within the main branch is built, packaged, and shipped through various media types. This includes ISO images and feature update packages available on Windows Update,” Microsoft noted in a document seen by Windows Latest.
Since ESDs are now hosted on Microsoft’s servers, it suggests the company is preparing Windows 11 26H2 installation media for public rollout. ESDs also appeared ahead of 25H2’s rollout, but there’s no fixed countdown.
As I pointed out in my previous report, Microsoft’s annual Windows 11 releases have consistently arrived on Tuesdays:
| Windows 11 version | Public release date | Public release day |
|---|---|---|
| 21H2 (original launch) | October 5, 2021 | Tuesday (first of the month) |
| 22H2 (2022 Update) | September 20, 2022 | Tuesday (third of the month) |
| 23H2 (2023 Update) | October 31, 2023 | Tuesday (fifth of the month) |
| 24H2 (2024 Update) | October 1, 2024 | Tuesday (first of the month) |
| 25H2 (2025 Update) | September 30, 2025 | Tuesday (fifth of the month) |
| 26H2 (upcoming) | Pending as of September 29, 2026 | Pending |
| 26H1 is a hardware-specific release for new devices and is excluded from this annual-update comparison. | ||
What’s the point of Windows 11 26H2 when it’s a nothingburger release?
Windows 11 has an annual feature update cadence, which means it’s supposed to get one annual feature update/new version release every year, with a new Windows lifecycle. For those unaware, annual releases get 24 months of support for Home/Pro and 36 months for Enterprise/Education.
Windows 11 24H2 was released nearly two years ago, and its Home/Pro support wraps up in October 2026. Likewise, Windows 11 25H2, which shipped last year, loses support for these editions in just over a year. With 26H2, supported PCs get a new support window.
| Windows 11 version | Home and Pro support ends | Enterprise and Education support ends |
|---|---|---|
| 21H2 | October 10, 2023 | October 8, 2024 |
| 22H2 | October 8, 2024 | October 14, 2025 |
| 23H2 | November 11, 2025 | November 10, 2026 |
| 24H2 | October 13, 2026 | October 12, 2027 |
| 25H2 | October 12, 2027 | October 10, 2028 |
| 26H1 | March 14, 2028 | March 13, 2029 |
| 26H2 (upcoming) | Not announced | Not announced |
| Sources: Home and Pro and Enterprise and Education. LTSC editions have separate lifecycles: Enterprise LTSC 2024 ends October 9, 2029; IoT Enterprise LTSC 2024 ends October 10, 2034. | ||
Windows 11 26H2 still installs as a small enablement package
Windows 11 26H2 is this year’s annual ‘feature’ update, but it doesn’t have any new features for consumers. Nothing showed up in our tests. For enterprises, there are two notable changes to the default settings.
First, Point-in-time restore, which allows you to roll Windows back to an earlier state when something goes wrong, will be enabled by default on enterprise-managed PCs with a Windows partition of at least 200GB.
And Windows settings backup, previously called Windows Backup for Organizations, will also be enabled by default on eligible enterprise PCs. Existing admin policies still apply, and restoring backups still requires admin configuration.
Point-in-time restore is already enabled by default on eligible consumer PCs.
On up-to-date 24H2 and 25H2 PCs, 26H2 will install as a small eKB, or enablement package, because all three versions share the same platform.
“When devices move between Windows versions on the same servicing branch, the update experience is much closer to a monthly quality update than to a traditional operating system replacement,” Microsoft explained in a document seen by Windows Latest.
The document also highlights “Simpler planning for IT because testing can focus on newly enabled features instead of re-validating the entire operating system stack.”
