Windows 11 26H2 is the next annual feature update, and the Windows 11 26H2 upgrade path your PC takes depends entirely on which version it is running today. For most machines it will be a download measured in kilobytes and a single restart. For a smaller group it will be a full operating system upgrade. And for one specific set of PCs — the ones running Windows 11 26H1 — Microsoft has confirmed the update will not be offered at all.
Microsoft has not announced a release date. Its guidance for IT administrators, published in June and last updated on 3 August, says only that the update sits in the annual second-half-of-the-year slot and that more information will follow once 26H2 reaches the Release Preview channel. Windows Latest, which has tracked the release closely, expects it around late September or early October. Treat that as an estimate, not a commitment — and see below for why the difference matters if you are on 24H2.
Windows 11 26H2 upgrade paths, by the version you are on now
The reason the experience varies so much is the servicing branch. Windows 11 24H2, 25H2 and 26H2 are all built from the same underlying code, internally codenamed Germanium. They share identical code, identical monthly patches and identical compatibility testing; by Microsoft’s own account, the only thing separating one version from the next is which features are switched on.
Practically, that means the new code has been arriving on your PC inside ordinary monthly updates for months, switched off. The feature update just flips the switches. Here is how that shakes out:
- Windows 11 24H2 or 25H2 — offered as a small enablement package. The install is closer to a routine monthly update than an upgrade: a short download, one restart, then a new build number. Windows Latest measured the 26H2 enablement package at 174KB.
- Windows 11 22H2 or 23H2 — Windows Latest reports these will be offered 26H2 as a full feature update, since they sit on an older servicing branch that Windows has to move the machine off. Microsoft’s guidance does not spell this path out, and Windows Latest notes it gives no download size for it either, so treat a multi-gigabyte download and a proper offline install phase as the sensible expectation rather than a published figure. More urgently: 23H2 has already stopped receiving updates on Home and Pro, so anyone still on it is unsupported today and should not wait for 26H2.
- A clean install from scratch — Windows Latest reports that installation media (an ISO) will also be an option when 26H2 ships. Microsoft’s public guidance does not mention it.
The PCs that will not be offered 26H2
This is the part worth knowing before you buy anything. Windows 11 26H1 is a separate release scoped to new devices launched in early 2026, and it is built on a different Windows core. Microsoft states the consequence plainly in its 26H2 guidance:
Devices running Windows 11, version 26H1 won’t be able to update to version 26H2. Instead, they’ll have a path to update to a future Windows release.
— Microsoft, Windows IT Pro Blog
So a 26H1 machine is not abandoned, but it skips this cycle entirely and waits for whatever comes after. Microsoft has not said what that release is or when it arrives, which is a thin answer for anyone who paid for a brand-new laptop this year and now has to take on trust that a bridge exists.
How long 26H2 keeps you supported
Moving to a new annual version resets the support clock. Microsoft’s stated durations for 26H2 are the usual ones:
- 24 months — Home, Pro, Pro Education and Pro for Workstations
- 36 months — Enterprise, Education, IoT Enterprise and Enterprise multi-session
The exact end dates depend on when 26H2 becomes generally available, and Microsoft has not published them.
Should you wait for it, or move to 25H2 now?
If you are still on 24H2, do not gamble on the timing. Windows 11 24H2 stops receiving security updates on 13 October 2026 for Home and Pro, and there is no consumer extended-updates option. Since 26H2 has no confirmed date and could land either side of that deadline, the safe move is to take 25H2 now — it is the same tiny enablement package, it runs to October 2027, and 26H2 will still be a one-restart hop from there when it does arrive.
One change that is not just a version number: Microsoft has confirmed 26H2 turns on point-in-time restore for managed and enterprise PCs, which already defaults to on for most Home and Pro machines. Worth checking which side of that your PC falls on before the update lands.
Sources: Microsoft Windows IT Pro Blog, Windows Latest
