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 1507 | x86 |
KB5034233
Details2024-01 Dynamic Update for Windows 10 Version 1507 for x86-based Systems (KB5034233) Classification: Critical Updates. Size: 5.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5034234
Details2024-01 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5034234) Classification: Critical Updates. Size: 6.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5034234
Details2024-01 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5034234) Classification: Critical Updates. Size: 5.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5034234
Details2024-01 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5034234) Classification: Critical Updates. Size: 6.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5034234
Details2024-01 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5034234) Classification: Critical Updates. Size: 5.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5034235
Details2024-01 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5034235) Classification: Critical Updates. Size: 6.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Microsoft server operating system 22H2 | x64 |
KB5034235
Details2024-01 Dynamic Update for Microsoft server operating system, version 22H2 for x64-based Systems (KB5034235) Classification: Critical Updates. Size: 6.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 | arm64 |
KB5034236
Details2024-01 Dynamic Update for Windows 11 for ARM64-based Systems (KB5034236) Classification: Critical Updates. Size: 4.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 | x64 |
KB5034236
Details2024-01 Dynamic Update for Windows 11 for x64-based Systems (KB5034236) Classification: Critical Updates. Size: 3.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2024-01-09 | Not available |
Package / download |
| Windows 11 | arm64 |
KB5033288
Details2023-11 Dynamic Update for Windows 11 for ARM64-based Systems (KB5033288) Classification: Critical Updates. Size: 4.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-11-14 | Not available |
Package / download |
| Windows 11 | x64 |
KB5033288
Details2023-11 Dynamic Update for Windows 11 for x64-based Systems (KB5033288) Classification: Critical Updates. Size: 3.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-11-14 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5031476
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5031476) Classification: Critical Updates. Size: 7.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-31 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5031476
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5031476) Classification: Critical Updates. Size: 8.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-31 | Not available |
Package / download |
| Windows 11 23H2 | arm64 |
KB5031894
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for arm64-based Systems (KB5031894) Classification: Critical Updates. Size: 6.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-31 | Not available |
Package / download |
| Windows 11 23H2 | x64 |
KB5031894
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 23H2 for x64-based Systems (KB5031894) Classification: Critical Updates. Size: 5.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-31 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5031894
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5031894) Classification: Critical Updates. Size: 6.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-26 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5031894
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5031894) Classification: Critical Updates. Size: 5.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-26 | Not available |
Package / download |
| Windows 10 1507 | x64 |
KB5031470
Details2023-10 Dynamic Update for Windows 10 Version 1507 for x64-based Systems (KB5031470) Classification: Critical Updates. Size: 6.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1507 | x86 |
KB5031470
Details2023-10 Dynamic Update for Windows 10 Version 1507 for x86-based Systems (KB5031470) Classification: Critical Updates. Size: 5.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB5031471
Details2023-10 Dynamic Update for Windows 10 Version 1607 for x64-based Systems (KB5031471) Classification: Critical Updates. Size: 15.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1607 | x86 |
KB5031471
Details2023-10 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5031471) Classification: Critical Updates. Size: 13.2 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1809 | arm64 |
KB5031472
Details2023-10 Dynamic Update for Windows 10 Version 1809 for ARM64-based Systems (KB5031472) Classification: Critical Updates. Size: 5.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5031472
Details2023-10 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5031472) Classification: Critical Updates. Size: 4.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5031472
Details2023-10 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5031472) Classification: Critical Updates. Size: 2.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5031473
Details2023-10 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5031473) Classification: Critical Updates. Size: 8.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Microsoft server operating system 22H2 | x64 |
KB5031473
Details2023-10 Dynamic Update for Microsoft server operating system, version 22H2 for x64-based Systems (KB5031473) Classification: Critical Updates. Size: 8.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5031474) Classification: Critical Updates. Size: 9.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 21H2 | x64 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 21H2 for x64-based Systems (KB5031474) Classification: Critical Updates. Size: 12.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 21H2 | x86 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 21H2 for x86-based Systems (KB5031474) Classification: Critical Updates. Size: 6.3 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 22H2 | arm64 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 22H2 for ARM64-based Systems (KB5031474) Classification: Critical Updates. Size: 9.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 22H2 | x64 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 22H2 for x64-based Systems (KB5031474) Classification: Critical Updates. Size: 12.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 10 22H2 | x86 |
KB5031474
Details2023-10 Dynamic Update for Windows 10 Version 22H2 for x86-based Systems (KB5031474) Classification: Critical Updates. Size: 6.3 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 11 | arm64 |
KB5031475
Details2023-10 Dynamic Update for Windows 11 for ARM64-based Systems (KB5031475) Classification: Critical Updates. Size: 4.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 11 | x64 |
KB5031475
Details2023-10 Dynamic Update for Windows 11 for x64-based Systems (KB5031475) Classification: Critical Updates. Size: 5.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5031476
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5031476) Classification: Critical Updates. Size: 7.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5031476
Details2023-10 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5031476) Classification: Critical Updates. Size: 8.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-10-10 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5029863
Details2023-08 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5029863) Classification: Critical Updates. Size: 6.6 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-08-22 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5029863
Details2023-08 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5029863) Classification: Critical Updates. Size: 5.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-08-22 | Not available |
Package / download |
| Windows 11 22H2 | arm64 |
KB5028495
Details2023-07 Safe OS Dynamic Update for Windows 11 Version 22H2 for arm64-based Systems (KB5028495) Classification: Critical Updates. Size: 4.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-07-26 | Not available |
Package / download |
| Windows 11 22H2 | x64 |
KB5028495
Details2023-07 Safe OS Dynamic Update for Windows 11 Version 22H2 for x64-based Systems (KB5028495) Classification: Critical Updates. Size: 3.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-07-26 | Not available |
Package / download |
| Windows 10 1809 | arm64 |
KB5029029
Details2023-07 Dynamic Update for Windows 10 Version 1809 for ARM64-based Systems (KB5029029) Classification: Critical Updates. Size: 5.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-07-11 | Not available |
Package / download |
| Windows 10 1809 | x64 |
KB5029029
Details2023-07 Dynamic Update for Windows 10 Version 1809 for x64-based Systems (KB5029029) Classification: Critical Updates. Size: 3.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-07-11 | Not available |
Package / download |
| Windows 10 1809 | x86 |
KB5029029
Details2023-07 Dynamic Update for Windows 10 Version 1809 for x86-based Systems (KB5029029) Classification: Critical Updates. Size: 2.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-07-11 | Not available |
Package / download |
| Windows 10 1507 | x64 |
KB5027385
Details2023-06 Dynamic Update for Windows 10 Version 1507 for x64-based Systems (KB5027385) Classification: Critical Updates. Size: 6.7 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Windows 10 1507 | x86 |
KB5027385
Details2023-06 Dynamic Update for Windows 10 Version 1507 for x86-based Systems (KB5027385) Classification: Critical Updates. Size: 5.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB5027386
Details2023-06 Dynamic Update for Windows 10 Version 1607 for x64-based Systems (KB5027386) Classification: Critical Updates. Size: 15.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Windows 10 1607 | x86 |
KB5027386
Details2023-06 Dynamic Update for Windows 10 Version 1607 for x86-based Systems (KB5027386) Classification: Critical Updates. Size: 13.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Microsoft server operating system | x64 |
KB5027388
Details2023-06 Dynamic Update for Microsoft server operating system for x64-based Systems (KB5027388) Classification: Critical Updates. Size: 5.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Microsoft server operating system 22H2 | x64 |
KB5027388
Details2023-06 Dynamic Update for Microsoft server operating system, version 22H2 for x64-based Systems (KB5027388) Classification: Critical Updates. Size: 5.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
| Windows 10 21H2 | arm64 |
KB5027389
Details2023-06 Dynamic Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5027389) Classification: Critical Updates. Size: 8.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2023-06-13 | Not available |
Package / download |
Programmatic access: GET /api/WindowsVersions/safeos. See API access and authentication.