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 | Not specified |
KB3194623
DetailsDynamic Update for Windows 10 Version 1607 (KB3194623) Classification: Critical Updates. Size: 0.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB3194623
DetailsDynamic Update for Windows 10 Version 1607 for x64-based Systems (KB3194623) Classification: Critical Updates. Size: 0.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1607 | Not specified |
KB4013419
DetailsDynamic Update for Windows 10 Version 1607 (KB4013419) Classification: Critical Updates. Size: 10.5 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB4013419
DetailsDynamic Update for Windows 10 Version 1607 for x64-based Systems (KB4013419) Classification: Critical Updates. Size: 11.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1703 | x64 |
KB4021572
Details2017-05 Dynamic Update for Windows 10 Version 1703 for x64-based Systems (KB4021572) Classification: Critical Updates. Size: 2.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1703 | x86 |
KB4021572
Details2017-05 Dynamic Update for Windows 10 Version 1703 for x86-based Systems (KB4021572) Classification: Critical Updates. Size: 1.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-08-28 | Not available |
Package / download |
| Windows 10 1703 | Not specified |
KB4020001
DetailsDynamic Update for Windows 10 Version 1703 (KB4020001) Classification: Critical Updates. Size: 1.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-05-31 | Not available |
Package / download |
| Windows 10 1703 | x64 |
KB4020001
DetailsDynamic Update for Windows 10 Version 1703 for x64-based Systems (KB4020001) Classification: Critical Updates. Size: 2.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2017-05-30 | Not available |
Package / download |
| Windows 10 1607 | Not specified |
KB3194623
DetailsDynamic Update for Windows 10 Version 1607 (KB3194623) Classification: Critical Updates. Size: 8.9 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-10-27 | Not available |
Package / download |
| Windows 10 1607 | x64 |
KB3194623
DetailsDynamic Update for Windows 10 Version 1607 for x64-based Systems (KB3194623) Classification: Critical Updates. Size: 10.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-10-27 | Not available |
Package / download |
| Windows 10 1511 | Not specified |
KB3142588
DetailsDynamic Update for Windows 10 Version 1511 (KB3142588) Classification: Critical Updates. Size: 10.4 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-03-08 | Not available |
Package / download |
| Windows 10 1511 | x64 |
KB3142588
DetailsDynamic Update for Windows 10 Version 1511 for x64-based Systems (KB3142588) Classification: Critical Updates. Size: 13.1 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-03-08 | Not available |
Package / download |
| Windows 10 1511 | Not specified |
KB3136561
DetailsDynamic Update for Windows 10 Version 1511 (KB3136561) Classification: Critical Updates. Size: 10.8 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-01-27 | Not available |
Package / download |
| Windows 10 1511 | x64 |
KB3136561
DetailsDynamic Update for Windows 10 Version 1511 for x64-based Systems (KB3136561) Classification: Critical Updates. Size: 13.0 MB. Support article details unavailable. Open the KB link for the authoritative information. |
Not available | 2016-01-27 | Not available |
Package / download |
Programmatic access: GET /api/WindowsVersions/safeos. See API access and authentication.