Windows 11 26H1 build 28000.1758 — release notes, downloads, known issues

Preview Update for Windows 11 (28000.1758)

Windows 11 26H1: Ships on new silicon only

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Coverage KB5079466: Windows 11 26H1 OS Build 28000.1719 Security and Reliability Mar 11, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 OOBE: Prepare for Secure Boot Certificate Update in 2026 Mar 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 OOBE and Secure Boot Certificate Refresh (2026) Mar 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 KB5079466: OS Build 28000.1719 with Multi MSU and Copilot+ AI Mar 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 26H1 Frühjahrs-Update: OEM Images und neue Updatepfade Mar 10, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage Windows 11 Copilot blunder and 26H1 Arm update: trust, docs, and support dates Mar 19, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage KB5083990 Setup Dynamic Update for Windows 11 26H1: Secure Boot Deadline Timing Mar 26, 2026 · Windows 11 26H1 coverage from this build's release window
Coverage KB5083466 Update Brings Intel OpenVINO Execution Provider to Windows 11 26H1 Mar 26, 2026 · Windows 11 26H1 coverage from this build's release window

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