Windows 11 24H2 build 26100.7900 (KB5078674) — release notes, downloads, known issues

Critical OOBE Update for Windows 11 - KB5078674 (26100.7900)

Windows 11 24H2: Supported; 25H2 is the enablement-package successor

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Coverage KB5078674 Windows 11 OOBE Update: Setup UI and Localization Tweaks Feb 24, 2026 · names this build
Coverage KB5083769 April 2026 Update: Windows 11 24H2/25H2 Reboot Loop Reports Apr 25, 2026 · Windows 11 24H2 coverage from this build's release window
Coverage Windows 11 24H2/25H2 Modern Standby Gets Tougher: Less Battery Drain Apr 27, 2026 · Windows 11 24H2 coverage from this build's release window
Coverage Windows 11 25H2 rollout for 24H2 users: Why KB5083769 timing feels risky Apr 28, 2026 · Windows 11 24H2 coverage from this build's release window
Issue Windows 11 24H2 to 25H2 Rollout Begins as KB5083769 Boot Loop Reports Rise Apr 28, 2026 · Windows 11 24H2 coverage from this build's release window
Coverage KB5089169 Updates AMD Vitis AI Execution Provider for Windows 11 24H2/25H2 Apr 28, 2026 · Windows 11 24H2 coverage from this build's release window
Coverage KB5089168 Updates Windows ML TensorRT-RTX Provider for RTX on 24H2 and 25H2 Apr 28, 2026 · Windows 11 24H2 coverage from this build's release window
Coverage KB5089617 Update: Qualcomm QNN Execution Provider for Windows 11 24H2/25H2 Apr 28, 2026 · Windows 11 24H2 coverage from this build's release window

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