Windows 11 · 25H2 · Release · Security update (Patch Tuesday)
Windows 11, version 25H2 (26200.8457)
- Release
- KB5089549 — Microsoft's article, opens in a new tab
- amd64
- arm64
Windows 11 25H2: Current mainstream release
AI summary
Windows 11, version 25H2 (26200.8457) delivers an enablement-package style update that activates previously staged AI and UX capabilities, focusing on incremental Start/Explorer refinements, security hardening, and operational performance improvements with minimal disruption.
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
- Issue Windows 11 KB5089549 Fix: EFI Partition Space Issue Resolved by KB5089573
- Issue Fix KB5089549 Windows 11 EFI Partition Space Error 0x800f0922
- Issue KB5089549 for Windows 11: Explorer.exe Fixes Taskbar Issues, Yet Fails with 0x800f0922
- Issue KB5089573 Windows 11 Preview: EFI Partition Space Causes KB5089549 Error 0x800f0922
In the news
- Coverage EFI System Partition Check for KB5089549 0x800f0922 on Win 11 24H2/25H2
- Issue Windows 11 KB5089549 Fix: EFI Partition Space Issue Resolved by KB5089573
- Issue Fix KB5089549 Windows 11 EFI Partition Space Error 0x800f0922
- Issue KB5089549 for Windows 11: Explorer.exe Fixes Taskbar Issues, Yet Fails with 0x800f0922
- Issue KB5089573 Windows 11 Preview: EFI Partition Space Causes KB5089549 Error 0x800f0922
- Issue KB5089549 for Windows 11 May 2026: Fixes explorer.exe, but Error 0x800f0922
- Fix BitLocker Recovery Key Prompt After KB5083769: Fix in KB5089549
- Issue KB5089549 May 2026 Update Fixes explorer.exe Freezes After Windows 11 Sign-In