Windows 11 26H1 build 28000.1450 — release notes, downloads, known issues

Security Update for Windows 11 (28000.1450)

Windows 11 26H1: Ships on new silicon only

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Coverage Windows 11 26H1 Canary Signals Platform First ARM Silicon Enablement Jan 11, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 2026 Roadmap: 26H1 Snapdragon Platform and 26H2 AI First Features Jan 22, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Bromine Platform Release: What It Means for New PCs Feb 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Bromine: Factory Image for Snapdragon X2 PCs Feb 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 vs 26H2: Parallel Arm Platform and Broad 2026 Update Feb 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Bromine: Platform Release for Next Gen ARM Laptops Feb 11, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Bromine: Snapdragon X2 Platform Release Explained Feb 11, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Bromine: Platform Image for Snapdragon X2 Arm Laptops Feb 11, 2026 · Windows 11 26H1 coverage from this build's release window

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