Windows 11 26H2 Rollout Begins With Enablement Package To Build 26300.9457
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.