Summary
This update makes improvements to Windows setup binaries or any files that setup uses for feature updates in Windows 11, version 23H2.
How to get this update
Install this update
To install this update, use one of the following release channels.
| Available | Next step |
|---|---|
|
This update is available through Windows Update. It will be downloaded and installed automatically. |
| Prerequisites | There are no prerequisites to apply this update. |
|---|---|
| Restart information | You do not have to restart your computer after you apply this update. |
| Update replacement information | This update replaces the previously released update KB5071416. |
File information
The English (United States) version of this software update installs files that have the following attributes. This update might contain files for additional languages.
For all supported x64-based versions
| File name | File version | Date | Time | File size |
|---|---|---|---|---|
| acmigration.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 660,864 |
| Appraiser.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 2,876,840 |
| appraiser.sdb | Not versioned | 15-Dec-25 | 1:00 | 2,761,104 |
| AppraiserRes.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 181,664 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 25,600 |
| bcd.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 154,344 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 29,696 |
| bootsvc.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 294,848 |
| cmi2migxml.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 230,816 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 25,088 |
| csiagent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 763,264 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 28,672 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 30,208 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 31,744 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 26,624 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 27,648 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 30,720 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 31,232 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 24,576 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 28,160 |
| imagelib.dll | Not versioned | 15-Dec-25 | 1:00 | 968,104 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 20,992 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 20,480 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 27,136 |
| MediaSetupUIMgr.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,254,784 |
| migcore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 9,762,208 |
| mighost.exe | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 279,936 |
| migisol.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 148,864 |
| migres.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 26,008 |
| MigStore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,357,208 |
| MigSys.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 492,928 |
| MXEAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 411,032 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 29,184 |
| ReAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 726,432 |
| EdgeMigrationPlugin.dll | 1.0.0.1 | 15-Dec-25 | 1:00 | 157,072 |
| microsoft-hyper-v-migration-replacement.man | Not versioned | 15-Dec-25 | 1:00 | 6,052 |
| Microsoft-Windows-CoreSystem-InitMachineConfig-Replacement.man | Not versioned | 15-Dec-25 | 1:00 | 1,658 |
| ServicingCommon.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,001,400 |
| ServicingCommon.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,001,376 |
| VsmKeyMigPlugin.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 107,928 |
| tcblaunch-replacement.man | Not versioned | 15-Dec-25 | 1:00 | 1,935 |
| tpmdriverwmi-replacement.man | Not versioned | 15-Dec-25 | 1:00 | 2,695 |
| twinui-replacement.man | Not versioned | 15-Dec-25 | 1:00 | 12,912 |
| ReserveManager.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 308,632 |
| Setup.exe | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 333,184 |
| SetupCore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 2,397,608 |
| SetupMgr.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,115,536 |
| SetupPlatform.cfg | Not versioned | 15-Dec-25 | 1:00 | 17,298 |
| SetupPlatform.dll | 1.74.22621.6481 | 15-Dec-25 | 1:00 | 9,692,576 |
| SetupPlatform.exe | 1.74.22621.6481 | 15-Dec-25 | 1:00 | 271,744 |
| SetupPrep.exe | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 1,303,936 |
| UpdateAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 3,474,856 |
| upgradeagent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 3,331,480 |
| winsetup.dll | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 3,061,120 |
| WinSetupBoot.sys | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 112,032 |
| WinSetupMon.sys | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 107,920 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 17,920 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:00 | 18,432 |
For all supported Arm64-based versions
| File name | File version | Date | Time | File size |
|---|---|---|---|---|
| acmigration.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,131,904 |
| Appraiser.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 2,857,856 |
| appraiser.sdb | Not versioned | 15-Dec-25 | 1:01 | 1,972,597 |
| AppraiserRes.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 173,976 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 25,600 |
| bcd.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 142,576 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 29,696 |
| bootsvc.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 281,560 |
| cmi2migxml.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 221,072 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 25,088 |
| csiagent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 759,168 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 28,672 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 30,208 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 31,744 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 26,624 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 27,648 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 30,720 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 31,232 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 24,576 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 28,160 |
| imagelib.dll | Not versioned | 15-Dec-25 | 1:01 | 980,384 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 20,992 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 20,480 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 27,136 |
| MediaSetupUIMgr.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,257,856 |
| migcore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 10,191,776 |
| mighost.exe | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 265,600 |
| migisol.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 115,096 |
| migres.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 17,296 |
| MigStore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,388,440 |
| MigSys.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 497,056 |
| MXEAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 401,296 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 29,184 |
| ReAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,197,456 |
| EdgeMigrationPlugin.dll | 1.0.0.1 | 15-Dec-25 | 1:01 | 149,888 |
| microsoft-hyper-v-migration-replacement.man | Not versioned | 15-Dec-25 | 1:01 | 6,052 |
| Microsoft-Windows-CoreSystem-InitMachineConfig-Replacement.man | Not versioned | 15-Dec-25 | 1:01 | 1,658 |
| ServicingCommon.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,837,304 |
| ServicingCommon.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,837,280 |
| VsmKeyMigPlugin.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 94,592 |
| tcblaunch-replacement.man | Not versioned | 15-Dec-25 | 1:01 | 1,935 |
| tpmdriverwmi-replacement.man | Not versioned | 15-Dec-25 | 1:01 | 2,695 |
| twinui-replacement.man | Not versioned | 15-Dec-25 | 1:01 | 12,912 |
| ReserveManager.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 302,480 |
| Setup.exe | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 315,800 |
| SetupCore.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 2,452,368 |
| SetupMgr.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,165,696 |
| SetupPlatform.cfg | Not versioned | 15-Dec-25 | 1:01 | 17,298 |
| SetupPlatform.dll | 1.74.22621.6481 | 15-Dec-25 | 1:01 | 10,214,344 |
| SetupPlatform.exe | 1.74.22621.6481 | 15-Dec-25 | 1:01 | 261,504 |
| SetupPrep.exe | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 1,333,136 |
| UpdateAgent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 3,602,328 |
| upgradeagent.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 3,464,600 |
| winsetup.dll | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 3,022,720 |
| WinSetupBoot.sys | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 83,872 |
| WinSetupMon.sys | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 81,832 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 17,920 |
| SetupPrep.exe.mui | 10.0.22621.6481 | 15-Dec-25 | 1:01 | 18,432 |
References
Description of the standard terminology that is used to describe Microsoft software updates
Query words: Setup DU