Windows 11 26H2 Rollout Begins With Enablement Package To Build 26300.9457
The staged, randomized rollout and the enablement package path mean most users will see the update arrive on Microsoft's schedule rather than their own, so the practical change this week is a version number, not a feature set.
Reporting from 1 source: ASCII.jp.
Microsoft began distributing Windows 11 Ver.26H2 on September 29, 2026, pushing machines from 25H2 to 26H2 through an enablement package and on to OS build 26300.9457. Because distribution is random, some PCs have the notification and others do not. The author's own machines show the split, with one in regular use updated and others still waiting.
The 26H2 enablement package moves a PC from 25H2 to 26H2, then the September 2026 D update takes it to OS build 26300.9550. The final 25H2 build, 26200.9550, shipped on September 22, a week before 26H2 arrived. On ARM hardware the same order applies, though the enablement package did not land immediately. Turning on "Get the latest updates as soon as they're available" in Windows Update is described as raising the priority of distribution. Microsoft also lists known issues for 26H2, and updates may be halted on some configurations by a Safeguard Hold.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.