Safe OS Dynamic Updates
Recovery environment updates, tracked separately from Windows cumulative and Setup Dynamic Updates.
SafeOS updates service the Windows recovery environment (WinRE) used during recovery and feature updates. They can include security fixes and reliability improvements. A catalog classification of Critical Updates is not a CVE severity rating.
Installation channels, prerequisites, replacement information and the need to update installation media vary by KB. Always check the Microsoft deployment guidance and the relevant support article. This listing does not assess whether a device's WinRE is patched.
Package history
714 packages · 262 KB articles · Last successful refresh: . Automatic discovery every 6 hours. Microsoft Update Catalog source
714 matching packages. Each row is a catalog package; the same KB can apply to multiple versions and architectures.
Release date and package build come from the KB article when available. Catalog revised is Microsoft's catalog revision date, not the original release date. Missing article details are explicitly marked and retried automatically.
| Product / version | Architecture | KB / details | Release date | Catalog revised | Package build | Catalog |
|---|---|---|---|---|---|---|
| Windows 10 1607 | x86 |
KB5073931
Details2026-01 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5073931) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 29.5 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5073932
Details2026-01 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5073932) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.7 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5073932
Details2026-01 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5073932) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 12.4 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5073933
Details2026-01 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5073933) This update makes improvements to the Windows recovery environment (WinRE). The following is a summary of a known issue that this update addresses when you install this update. Classification: Critical Updates. Size: 44.7 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5073933
Details2026-01 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5073933) This update makes improvements to the Windows recovery environment (WinRE). The following is a summary of a known issue that this update addresses when you install this update. Classification: Critical Updates. Size: 24.2 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5073933
Details2026-01 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5073933) This update makes improvements to the Windows recovery environment (WinRE). The following is a summary of a known issue that this update addresses when you install this update. Classification: Critical Updates. Size: 12.9 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows (Ge) 25H2 | arm64 |
KB5074108
Details2026-01 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for arm64-based Systems (KB5074108) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 37.9 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows (Ge) 25H2 | x64 |
KB5074108
Details2026-01 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for x64-based Systems (KB5074108) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.0 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5074108
Details2026-01 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5074108) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 37.9 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5074108
Details2026-01 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5074108) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.0 MB. |
2026-01-13 | 2026-01-13 | Not available |
Package / download |
| Microsoft server operating system 23H2 | x64 |
KB5072536
Details2025-12 Safe OS Dynamic Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5072536) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 7.9 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Microsoft server operating system 24H2 | x64 |
KB5072537
Details2025-12 Safe OS Dynamic Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5072537) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows (Ge) 25H2 | arm64 |
KB5072537
Details2025-12 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for arm64-based Systems (KB5072537) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 37.6 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows (Ge) 25H2 | x64 |
KB5072537
Details2025-12 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for x64-based Systems (KB5072537) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5072537
Details2025-12 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5072537) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 37.6 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5072537
Details2025-12 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5072537) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 24.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB5072540
Details2025-12 Dynamic Update for Windows 10 Version 1607 for x64-based Systems (KB5072540) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 31.7 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 1607 | x86 |
KB5072540
Details2025-12 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5072540) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 21.7 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5072541
Details2025-12 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5072541) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 19.5 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5072541
Details2025-12 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5072541) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 9.7 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5072542
Details2025-12 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5072542) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 38.7 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5072542
Details2025-12 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5072542) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 19.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5072542
Details2025-12 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5072542) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 10.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5072543
Details2025-12 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5072543) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 39.2 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5072543
Details2025-12 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5072543) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 26.4 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5072545
Details2025-12 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5072545) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 17.3 MB. |
2025-12-09 | 2025-12-09 | Not available |
Package / download |
| Windows (Ge) 25H2 | arm64 |
KB5071844
Details2025-11 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for arm64-based Systems (KB5071844) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 37.5 MB. |
2025-12-01 | 2025-12-01 | Not available |
Package / download |
| Windows (Ge) 25H2 | x64 |
KB5071844
Details2025-11 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for x64-based Systems (KB5071844) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 24.4 MB. |
2025-12-01 | 2025-12-01 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5071844
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5071844) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 37.5 MB. |
2025-12-01 | 2025-12-01 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5071844
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5071844) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 24.4 MB. |
2025-12-01 | 2025-12-01 | Not available |
Package / download |
| Microsoft server operating system 23H2 | x64 |
KB5068788
Details2025-11 Safe OS Dynamic Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5068788) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 7.9 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB5068789
Details2025-11 Dynamic Update for Windows 10 Version 1607 for x64-based Systems (KB5068789) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 31.8 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 1607 | x86 |
KB5068789
Details2025-11 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5068789) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 21.9 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5068790
Details2025-11 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5068790) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 19.5 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5068790
Details2025-11 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5068790) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 9.7 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5068792
Details2025-11 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5068792) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 18.5 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5069340
Details2025-11 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5069340) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 38.0 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5069340
Details2025-11 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5069340) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 19.1 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5069340
Details2025-11 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5069340) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 10.1 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5069341
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5069341) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 39.0 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5069341
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5069341) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 26.3 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Microsoft server operating system 24H2 | x64 |
KB5070186
Details2025-11 Safe OS Dynamic Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5070186) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 22.2 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows (Ge) 25H2 | arm64 |
KB5070186
Details2025-11 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for arm64-based Systems (KB5070186) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 34.9 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows (Ge) 25H2 | x64 |
KB5070186
Details2025-11 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for x64-based Systems (KB5070186) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 22.2 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5070186
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5070186) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 34.9 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5070186
Details2025-11 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5070186) This update makes improvements to the Windows recovery environment (WinRE). Classification: Critical Updates. Size: 22.2 MB. |
2025-11-11 | 2025-11-11 | Not available |
Package / download |
| Windows (Ge) 25H2 | arm64 |
KB5067040
Details2025-10 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for arm64-based Systems (KB5067040) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 34.8 MB. |
2025-10-28 | 2025-10-28 | Not available |
Package / download |
| Windows (Ge) 25H2 | x64 |
KB5067040
Details2025-10 Safe OS Dynamic Update for Windows (Ge) Version 25H2 for x64-based Systems (KB5067040) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 22.1 MB. |
2025-10-28 | 2025-10-28 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5067040
Details2025-10 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5067040) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 34.8 MB. |
2025-10-28 | 2025-10-28 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5067040
Details2025-10 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5067040) This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2, Windows 11, version 25H2 and Windows Server 2025. Classification: Critical Updates. Size: 22.1 MB. |
2025-10-28 | 2025-10-28 | Not available |
Package / download |
Programmatic access: GET /api/WindowsVersions/safeos. See API access and authentication.