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 1809 | x86 |
KB5044614
Details2024-10 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5044614) This update makes improvements to the Windows recovery environment in Windows 10, version 1809 and Windows Server 2019. Classification: Critical Updates. Size: 3.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 5.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 4.6 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 2.4 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 22H2 | arm64 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 22H2 for ARM64-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 5.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 22H2 | x64 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 22H2 for x64-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 4.6 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 22H2 | x86 |
KB5044615
Details2024-10 Dynamic Update for Windows 10 Version 22H2 for x86-based Systems (KB5044615) This update makes improvements to the Windows recovery environment in Windows 10, version 21H2 and Windows 10, version 22H2. Classification: Critical Updates. Size: 2.4 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 1507 | x64 |
KB5044616
Details2024-10 Dynamic Update for Windows 10 Version 1507 for x64-based Systems (KB5044616) This update makes improvements to the Windows recovery environment in Windows 10, version 1507. Classification: Critical Updates. Size: 18.1 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 10 1507 | x86 |
KB5044616
Details2024-10 Dynamic Update for Windows 10 Version 1507 for x86-based Systems (KB5044616) This update makes improvements to the Windows recovery environment in Windows 10, version 1507. Classification: Critical Updates. Size: 13.0 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5044617
Details2024-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5044617) This update makes improvements to the Windows recovery environment in Windows 11, version 22H2 and Windows 11, version 23H2. Classification: Critical Updates. Size: 10.4 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5044617
Details2024-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5044617) This update makes improvements to the Windows recovery environment in Windows 11, version 22H2 and Windows 11, version 23H2. Classification: Critical Updates. Size: 7.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5044617
Details2024-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5044617) This update makes improvements to the Windows recovery environment in Windows 11, version 22H2 and Windows 11, version 23H2. Classification: Critical Updates. Size: 10.4 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5044617
Details2024-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5044617) This update makes improvements to the Windows recovery environment in Windows 11, version 22H2 and Windows 11, version 23H2. Classification: Critical Updates. Size: 7.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5044618
Details2024-10 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5044618) This update makes improvements to the Windows recovery environment in Azure Stack HCI, version 22H2 and Windows Server 2022. Classification: Critical Updates. Size: 6.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Microsoft server operating system 22H2 | x64 |
KB5044618
Details2024-10 Dynamic Update for Microsoft server operating system, version 22H2 for x64-based Systems (KB5044618) This update makes improvements to the Windows recovery environment in Azure Stack HCI, version 22H2 and Windows Server 2022. Classification: Critical Updates. Size: 6.5 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 | arm64 |
KB5044619
Details2024-10 Dynamic Update for Windows 11 for ARM64-based Systems (KB5044619) This update makes improvements to the Windows recovery environment in Windows 11, version 21H2. Classification: Critical Updates. Size: 4.6 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 | x64 |
KB5044619
Details2024-10 Dynamic Update for Windows 11 for x64-based Systems (KB5044619) This update makes improvements to the Windows recovery environment in Windows 11, version 21H2. Classification: Critical Updates. Size: 3.9 MB. |
2024-10-08 | 2024-10-08 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5043934
Details2024-09 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5043934) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 2.1 MB. |
2024-09-30 | 2024-09-30 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5043934
Details2024-09 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5043934) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 1.5 MB. |
2024-09-30 | 2024-09-30 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5043355
Details2024-09 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5043355) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 2.0 MB. |
2024-09-10 | 2024-09-10 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5043355
Details2024-09 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5043355) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 1.5 MB. |
2024-09-10 | 2024-09-10 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5041980
Details2024-08 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5041980) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 1.8 MB. |
2024-08-27 | 2024-08-27 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5041980
Details2024-08 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5041980) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 1.3 MB. |
2024-08-27 | 2024-08-27 | Not available |
Package / download |
| Microsoft server operating system 23H2 | x64 |
KB5041593
Details2024-08 Safe OS Dynamic Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5041593) This update makes improvements to the Windows recovery environment in Windows Server, version 23H2. Classification: Critical Updates. Size: 0.5 MB. |
2024-08-13 | 2024-08-13 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5041979
Details2024-07 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5041979) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 0.6 MB. |
2024-07-30 | 2024-07-30 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5041979
Details2024-07 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5041979) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 0.4 MB. |
2024-07-30 | 2024-07-30 | Not available |
Package / download |
| Windows 11 24H2 | arm64 |
KB5041137
Details2024-06 Safe OS Dynamic Update for Windows 11 Version 24H2 for arm64-based Systems (KB5041137) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 0.6 MB. |
2024-06-28 | 2024-06-28 | Not available |
Package / download |
| Windows 11 24H2 | x64 |
KB5041137
Details2024-06 Safe OS Dynamic Update for Windows 11 Version 24H2 for x64-based Systems (KB5041137) This update makes improvements to the Windows recovery environment in Windows 11, version 24H2. Classification: Critical Updates. Size: 0.4 MB. |
2024-06-28 | 2024-06-28 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5037739
Details2024-04 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5037739) Classification: Critical Updates. Size: 10.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-04-23 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5037739
Details2024-04 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5037739) Classification: Critical Updates. Size: 7.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-04-23 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5037739
Details2024-04 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5037739) Classification: Critical Updates. Size: 10.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-04-23 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5037739
Details2024-04 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5037739) Classification: Critical Updates. Size: 7.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-04-23 | Not available |
Package / download |
| Microsoft server operating system 23H2 | x64 |
KB5037065
Details2024-04 Safe OS Dynamic Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5037065) Classification: Critical Updates. Size: 0.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-04-09 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5036567
Details2024-03 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5036567) Classification: Critical Updates. Size: 7.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-03-26 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5036567
Details2024-03 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5036567) Classification: Critical Updates. Size: 5.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-03-26 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5036567
Details2024-03 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5036567) Classification: Critical Updates. Size: 7.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-03-26 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5036567
Details2024-03 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5036567) Classification: Critical Updates. Size: 5.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-03-26 | Not available |
Package / download |
| Microsoft server operating system 23H2 | x64 |
KB5034229
Details2024-01 Safe OS Dynamic Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5034229) Classification: Critical Updates. Size: 0.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB5034230
Details2024-01 Dynamic Update for Windows 10 Version 1607 for x64-based Systems (KB5034230) Classification: Critical Updates. Size: 15.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1607 | x86 |
KB5034230
Details2024-01 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5034230) Classification: Critical Updates. Size: 13.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1809 | arm64 |
KB5034231
Details2024-01 Dynamic Update for Windows 10 Version 1809 for ARM64-based Systems (KB5034231) Classification: Critical Updates. Size: 5.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5034231
Details2024-01 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5034231) Classification: Critical Updates. Size: 4.3 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5034231
Details2024-01 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5034231) Classification: Critical Updates. Size: 2.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5034232) Classification: Critical Updates. Size: 8.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5034232) Classification: Critical Updates. Size: 7.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5034232) Classification: Critical Updates. Size: 3.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 22H2 | arm64 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 22H2 for ARM64-based Systems (KB5034232) Classification: Critical Updates. Size: 8.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 22H2 | x64 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 22H2 for x64-based Systems (KB5034232) Classification: Critical Updates. Size: 7.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 22H2 | x86 |
KB5034232
Details2024-01 Dynamic Update for Windows 10 Version 22H2 for x86-based Systems (KB5034232) Classification: Critical Updates. Size: 3.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 10 1507 | x64 |
KB5034233
Details2024-01 Dynamic Update for Windows 10 Version 1507 for x64-based Systems (KB5034233) Classification: Critical Updates. Size: 6.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
Programmatic access: GET /api/WindowsVersions/safeos. See API access and authentication.