Windows 11 · 26H1 · Release
Critical OOBE Update for Windows 11 - KB5081921 (28000.1701)
- Release
- Cumulative update
- KB5081921 — Microsoft's article, opens in a new tab
- amd64
- arm64
Windows 11 26H1: Ships on new silicon only
AI summary
KB5081921 (28000.1701) delivers a critical Windows 11 OOBE update that strengthens Secure Boot-related trust for secure setup, and includes stability/performance bug fixes for smoother first-boot. fileciteturn0file0
Generated from the package's release notes and forum coverage. Verify against Microsoft's release-health page before acting on it.
Known issues — reported on the forum
No problems reported on the forum for this build yet. Threads that name 28000.1701 or KB5081921 and describe a fault appear here automatically.
In the news
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- Coverage KB5096572 Update: On-Device Phi Silica AI for Intel Copilot+ on Windows 11 26H1
Discussed on the forum
No member thread names 28000.1701 yet.