This past week Microsoft released Windows 11 25H2 under KB5065789 as build 26200.6725 which is also the latest available build, 26100.6725, for Windows 11 24H2. The company shared a full list of the major features in the new yearly feature update and also explained how easy it is to upgrade from 24H2 to 25H2 using the eKB5054156.
Alongside that the company also released new accompanying dynamic updates. For those who may not know, dynamic updates bring improvements to the Windows Recovery in the form of Windows Recovery Environment (WinRE) updates, also called Safe OS updates, as well as to the Setup binaries in the form of Setup updates.
These Dynamic Update packages are meant to be applied to existing Windows images prior to their deployment. These packages include fixes to Setup.exe binaries, SafeOS updates for Windows Recovery Environment, and more. Dynamic Updates also help preserve Language Pack (LP) and Features on Demand (FODs) content during the upgrade process. VBScript, for example, is currently an FOD on Windows 11 24H2.
Both setup and recovery updates were released but only for version 24H2 and previous versions did not receive them. The updates also apply to Windows Server 2025. The changelogs are given below. First up we have the Setup update:
KB5066683: Setup Dynamic Update for Windows 11, version 24H2 and Windows Server 2025: September 29, 2025
Summary
This update makes improvements to Windows setup binaries or any files that setup uses for feature updates in Windows 11, version 24H2 and Windows Server 2025.
Up next, we have the Safe OS recovery update and unlike the last time, Microsoft does not note any specific fix on this one as the general changelog is back. It writes:
KB5066687: Safe OS Dynamic Update for Windows 11, version 24H2 and Windows Server 2025: September 29, 2025
Summary
This update makes improvements to the Windows recovery environment (WinRE) in Windows 11, version 24H2 and Windows Server 2025.
Microsoft notes that the Recovery update will be downloaded and installed automatically via the Windows Update channel though the Setup update will require manual effort. You can also avail both of them on Microsoft’s Update Catalog website: KB5066683, KB5066687.
