Windows 11 26H1 build 28000.3230 (KB5132441) — release notes, downloads, known issues

Critical OOBE Update for Windows 11 - KB5132441 (28000.3230)

Windows 11 26H1: For specific new hardware; not a feature update for existing PCs

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Build: 28000.3230
Version line: Windows 11 26H1 (base 28000)
Line status: For specific new hardware; not a feature update for existing PCs
Channel: Release
Package: Cumulative update
Update: KB5132441
Released: October 13, 2026 (UUP Dump)
Architectures: amd64, arm64
UUID amd64: 9c40a274-dc9c-4b1e-afb9-04932ce2d27a
UUID arm64: 3924e57a-a102-4c71-9a3d-fe2f1c77e3ad