Overview
- Microsoft began distributing Windows 11 26H2 in the night to Wednesday, September 30, 2026, delivering it as a Feature Enablement Package that quickly activates features already present on the device and sets the build to 26300.9550.
- The company is using a staged rollout that sends the update first to devices with the option “Get the latest updates as soon as they are available” enabled while placing 'safeguard holds' to block systems with known incompatibilities.
- Microsoft has listed three known issues that carry mitigations: USB-Audio Class 1.0 devices losing sound and mic access, Active Directory domain sign‑in problems on managed PCs, and a post‑sign-in black screen in some Azure Virtual Desktop/FSLogix sessions.
- The release includes lifecycle dates that make the upgrade urgent for some users because support for Windows 11 24H2 Home and Pro ends on October 13, 2026, while 26H2 Home/Pro will be supported until October 10, 2028 and enterprise SKUs until October 9, 2029.
- IT administrators should consult the Windows‑IT‑Pro blog for deployment guidance and mitigations, noting that 26H2 follows an August Release Preview test and mainly switches on features already rolled out in 25H2 and 24H2.