Windows 11 · 26H2 · Release · Security update (Patch Tuesday)

Windows 11, version 26H2 (26300.9711)

Windows 11 26H2: Current annual release; availability depends on device eligibility and rollout

Microsoft release information · Verified Oct 13, 2026

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AI summary

Build 26300.9711 is the Windows 11, version 26H2 Release Preview update released October 13, 2026 (KB5127648). It includes security and quality fixes—among them Explorer, VPN, printing, and sign-in fixes—plus a new Manitoba time zone and ReFS auditing controls. (support.microsoft.com)

Generated from the package's release notes and forum coverage. Verify against Microsoft's release-health page before acting on it.

Microsoft's known issues — KB5127648

  • Issue Known issue After installing the September 8, 2026, Windows security update (KB5124012), some USB Audio Class 1.0 devices might fail to start or produce audio. Affected devices might experience one or more of the following symptoms: The device displays an error in Device Manager: "This device cannot start (Code 10).” The device displays an error in Device Manager: "This device cannot start (Code 10).” No audio output. No audio output. Volume controls are unresponsive or remain at zero. Volume controls are unresponsive or remain at zero. Sound settings are unresponsive or unavailable. Sound settings are unresponsive or unavailable. Some devices might function in standard stereo configurations but fail wh Workaround: This issue is partially resolved in the out-of-band (OOB) update released on September 14, 2026, (KB5129195) . This OOB update resolves the symptoms experienced on devices using 8-channel or 3D audio modes. Microsoft is working to address the other symptoms and will provide more information when it is available. IT administrators who need an immediate workaround for the symptoms not addressed yet by the OOB update should contact Microsoft Support for Business for assistance.

Microsoft's release notes for KB5127648 ›

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