This past week Microsoft released its latest Windows 11 C-release update (KB5077241) for February 2026. These are published as non-security preview releases and pack new features, though from time to time Microsoft also goes back on such announcements, as it recently did regarding a clean install requirement for a Windows 11-only feature.
Alongside the C release, Microsoft released corresponding new dynamic updates. For those who may not know, dynamic updates bring improvements to the Windows Recovery process in the form of Windows Recovery Environment (WinRE) updates, which are also called Safe OS updates. The dynamic updates also affect the Setup file binaries in the form of Setup updates.
These Dynamic Update packages are meant to be applied to existing Windows images prior to their deployment. 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 this time. The company writes:
"KB5078169: Safe OS Dynamic Update for Windows 11, version 26H1: February 24, 2026
This update makes improvements to the Windows recovery environment (WinRE).
KB5079271: Setup Dynamic Update for Windows 11, version 24H2 and 25H2: February 24, 2026
This update makes improvements to Windows setup binaries or any files that setup uses for feature updates in Windows 11, version 24H2 and Windows 11, version 25H2.
KB5079270: Safe OS Dynamic Update for Windows 11, versions 24H2 and 25H2: February 24, 2026
This update makes improvements to the Windows recovery environment (WinRE)."
Microsoft notes that both the Recovery and Setup updates will be downloaded and installed automatically via the Windows Update channel.