Windows 11 · 26H1 · Release · Security update (Patch Tuesday)
Windows 11, version 26H1 (28000.2704)
- Release
- KB5121000 — Microsoft's article, opens in a new tab
- amd64
- arm64
Windows 11 26H1: Ships on new silicon only
AI summary
Windows 11, version 26H1 (build 28000.2704), delivers production-quality performance improvements, security updates, and targeted bug fixes that enhance reliability, responsiveness, and protection. (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 — KB5121000
Microsoft lists no known issues for this update (KB5121000).
Known issues — reported on the forum
No problems reported on the forum for this build yet. Threads that name 28000.2704 or KB5121000 and describe a fault appear here automatically.
In the news
- Coverage KB5121000 Raises Windows 11 26H1 to Build 28000.2704
- Coverage KB5120999 Updates Windows 11 26H1 WinRE to 10.0.28000.2703
- Fix KB5120996 Brings Windows 11 26H1 Start and Power Fixes
- Coverage Windows 11 26H2 Skips 26H1 PCs but Updates 24H2/25H2
- Coverage KB5124890 Updates Qualcomm Phi Silica J32 on Windows 11 26H1
- Coverage KB5124886 Updates Qualcomm Copilot+ Image Processing for 26H1
- Coverage KB5123778 Refreshes Qualcomm QNN Runtime for Windows 11 26H1
Discussed on the forum
No member thread names 28000.2704 yet.