KB5074207: Setup Dynamic Update for Windows 10, version 21H2 and 22H2: January 13, 2026

Applies To
Windows 10 Enterprise LTSC 2021 Windows 10 ESU

Note

  • Windows Secure Boot certificate expiration
  • Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past months. Devices that haven’t received the newer certificates will continue to start and operate normally, and standard Windows updates will continue to install. We will continue to install the newer certificates via Windows updates in the coming months.
  • You can check your PC status on the Windows Security app. If you are an IT administrator, follow the guidance on the Secure Boot Playbook for Windows clients and Windows Server.

Summary

This update makes improvements to Windows setup binaries or any files that setup uses for feature updates in Windows 10, version 21H2 and Windows 10, version 22H2.

How to get this update

Install this update

To install this update, use one of the following release channels.


Available Next step
Available 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 KB5062682.

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 x86-based versions
File name File version Date Time File size
acmigration.dll 10.0.19041.6800 9-Dec-25 16:28 487,832
AcRes.dll 10.0.19041.6800 9-Dec-25 16:28 333,736
Appraiser.dll 10.0.19041.6800 9-Dec-25 16:28 1,899,416
appraiser.sdb Not versioned 9-Dec-25 16:28 2,456,015
AppraiserRes.dll 10.0.19041.6800 9-Dec-25 16:28 215,424
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 323,072
cmi2migxml.dll 10.0.19041.6800 9-Dec-25 16:28 147,328
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 347,136
csiagent.dll 10.0.19041.6800 9-Dec-25 16:28 535,960
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 338,432
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 377,856
diagtrack.dll 10.0.10586.10008 9-Dec-25 16:28 919,736
Dism.exe 10.0.19041.6800 9-Dec-25 16:28 226,216
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 394,752
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 372,224
Facilitator.dll 10.0.19041.6800 9-Dec-25 16:28 793,984
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 342,016
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 376,320
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 368,640
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 237,056
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 224,768
MediaSetupUIMgr.dll 10.0.19041.6800 9-Dec-25 16:28 13,846,944
migcore.dll 10.0.19041.6800 9-Dec-25 16:28 6,859,168
mighost.exe 10.0.19041.6800 9-Dec-25 16:28 249,752
migisol.dll 10.0.19041.6800 9-Dec-25 16:28 119,712
migres.dll 10.0.19041.6800 9-Dec-25 16:28 17,304
MigStore.dll 10.0.19041.6800 9-Dec-25 16:28 995,728
MigSys.dll 10.0.19041.6800 9-Dec-25 16:28 325,024
Mitigation.dll 10.0.19041.6800 9-Dec-25 16:28 298,880
MXEAgent.dll 10.0.19041.6800 9-Dec-25 16:28 258,944
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 339,456
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 380,928
offline.xml Not versioned 9-Dec-25 16:28 38,899
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 383,488
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 356,352
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 358,400
ReAgent.dll 10.0.19041.6800 9-Dec-25 16:28 964,480
AppXDeploymentServer-Replacement.man Not versioned 9-Dec-25 16:28 4,900
EdgeMigrationPlugin.man Not versioned 9-Dec-25 16:28 923
edpnotify-replacement.man Not versioned 9-Dec-25 16:28 830
fveApi-replacement.man Not versioned 9-Dec-25 16:28 1,101
Edge.dat Not versioned 9-Dec-25 16:28 12,288
EdgeMigrationPlugin.dll 1.0.0.1 9-Dec-25 16:28 90,024
EdgeUpdate.dat Not versioned 9-Dec-25 16:28 12,288
TileStoreMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:28 97,664
AppxUpgradeMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:28 380,816
iismig.dll 10.0.19041.6800 9-Dec-25 16:28 312,704
SxsMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:28 109,440
VsmKeyMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:28 68,008
PPIPolicies-General-Replacement.man Not versioned 9-Dec-25 16:28 2,161
PPIPolicies-Miracast-Replacement.man Not versioned 9-Dec-25 16:28 1,352
StartTileData-Replacement.man Not versioned 9-Dec-25 16:28 2,702
tcblaunch-replacement.man Not versioned 9-Dec-25 16:28 1,902
ReserveManager.dll 10.0.19041.6800 9-Dec-25 16:28 231,832
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 355,840
Setup.exe 10.0.19041.6800 9-Dec-25 16:28 244,136
setupcompat.dll 10.0.19041.6800 9-Dec-25 16:28 270,720
SetupCore.dll 10.0.19041.6800 9-Dec-25 16:28 1,900,448
SetupHost.exe 10.0.19041.6800 9-Dec-25 16:28 704,416
SetupMgr.dll 10.0.19041.6800 9-Dec-25 16:28 768,416
SetupPlatform.dll 1.60.19041.6800 9-Dec-25 16:28 7,231,904
SetupPlatform.exe 1.60.19041.6800 9-Dec-25 16:28 152,960
SetupPrep.exe 10.0.19041.6800 9-Dec-25 16:28 10,659,232
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 348,672
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 336,384
unbcl.dll 10.0.19041.6800 9-Dec-25 16:28 837,032
uninstall.xml Not versioned 9-Dec-25 16:28 3,508
UpdateAgent.dll 10.0.19041.6800 9-Dec-25 16:28 2,167,192
upgrade_bulk.xml Not versioned 9-Dec-25 16:28 208,513
upgradeagent.dll 10.0.19041.6800 9-Dec-25 16:28 2,418,592
WinDlp.dll 10.0.19041.6800 9-Dec-25 16:28 1,100,144
winsetup.dll 10.0.19041.6800 9-Dec-25 16:28 3,014,016
WinSetupBoot.sys 10.0.19041.6800 9-Dec-25 16:28 64,384
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:28 182,784
For all supported x64-based versions
File name File version Date Time File size
acmigration.dll 10.0.19041.6800 9-Dec-25 16:27 656,256
AcRes.dll 10.0.19041.6800 9-Dec-25 16:27 333,696
Appraiser.dll 10.0.19041.6800 9-Dec-25 16:27 2,261,920
appraiser.sdb Not versioned 9-Dec-25 16:27 2,759,359
AppraiserRes.dll 10.0.19041.6800 9-Dec-25 16:27 215,936
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 323,072
cmi2migxml.dll 10.0.19041.6800 9-Dec-25 16:27 192,384
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 347,136
csiagent.dll 10.0.19041.6800 9-Dec-25 16:27 725,888
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 338,432
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 377,856
diagtrack.dll 10.0.10586.10008 9-Dec-25 16:27 1,362,104
Dism.exe 10.0.19041.6800 9-Dec-25 16:27 289,152
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 394,752
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 372,224
Facilitator.dll 10.0.19041.6800 9-Dec-25 16:27 1,024,408
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 342,016
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 376,320
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 368,640
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 237,056
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 224,768
MediaSetupUIMgr.dll 10.0.19041.6800 9-Dec-25 16:27 14,034,848
migcore.dll 10.0.19041.6800 9-Dec-25 16:27 9,134,536
mighost.exe 10.0.19041.6800 9-Dec-25 16:27 260,480
migisol.dll 10.0.19041.6800 9-Dec-25 16:27 146,336
migres.dll 10.0.19041.6800 9-Dec-25 16:27 17,320
MigStore.dll 10.0.19041.6800 9-Dec-25 16:27 1,323,904
MigSys.dll 10.0.19041.6800 9-Dec-25 16:27 436,112
Mitigation.dll 10.0.19041.6800 9-Dec-25 16:27 388,496
MXEAgent.dll 10.0.19041.6800 9-Dec-25 16:27 360,352
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 339,456
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 380,928
offline.xml Not versioned 9-Dec-25 16:27 38,899
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 383,488
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 356,352
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 358,400
ReAgent.dll 10.0.19041.6800 9-Dec-25 16:27 1,165,184
AppXDeploymentServer-Replacement.man Not versioned 9-Dec-25 16:27 4,900
EdgeMigrationPlugin.man Not versioned 9-Dec-25 16:27 923
edpnotify-replacement.man Not versioned 9-Dec-25 16:27 830
fveApi-replacement.man Not versioned 9-Dec-25 16:27 1,101
Edge.dat Not versioned 9-Dec-25 16:27 12,288
EdgeMigrationPlugin.dll 1.0.0.1 9-Dec-25 16:27 114,600
EdgeUpdate.dat Not versioned 9-Dec-25 16:27 12,288
microsoft-hyper-v-migration-replacement.man Not versioned 9-Dec-25 16:27 6,088
TileStoreMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 126,888
AppxUpgradeMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 469,912
iismig.dll 10.0.19041.6800 9-Dec-25 16:27 377,760
SxsMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 134,016
VsmKeyMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 86,424
PPIPolicies-General-Replacement.man Not versioned 9-Dec-25 16:27 2,161
PPIPolicies-Miracast-Replacement.man Not versioned 9-Dec-25 16:27 1,352
StartTileData-Replacement.man Not versioned 9-Dec-25 16:27 2,702
tcblaunch-replacement.man Not versioned 9-Dec-25 16:27 1,902
ReserveManager.dll 10.0.19041.6800 9-Dec-25 16:27 302,464
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 355,840
Setup.exe 10.0.19041.6800 9-Dec-25 16:27 294,272
setupcompat.dll 10.0.19041.6800 9-Dec-25 16:27 352,128
SetupCore.dll 10.0.19041.6800 9-Dec-25 16:27 2,368,912
SetupHost.exe 10.0.19041.6800 9-Dec-25 16:27 885,120
SetupMgr.dll 10.0.19041.6800 9-Dec-25 16:27 989,608
SetupPlatform.dll 1.60.19041.6800 9-Dec-25 16:27 9,592,776
SetupPlatform.exe 1.60.19041.6800 9-Dec-25 16:27 170,880
SetupPrep.exe 10.0.19041.6800 9-Dec-25 16:27 10,872,736
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 348,672
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 336,384
unbcl.dll 10.0.19041.6800 9-Dec-25 16:27 1,099,160
uninstall.xml Not versioned 9-Dec-25 16:27 3,508
UpdateAgent.dll 10.0.19041.6800 9-Dec-25 16:27 2,833,824
upgrade_bulk.xml Not versioned 9-Dec-25 16:27 208,513
upgradeagent.dll 10.0.19041.6800 9-Dec-25 16:27 3,178,392
WinDlp.dll 10.0.19041.6800 9-Dec-25 16:27 1,439,600
winsetup.dll 10.0.19041.6800 9-Dec-25 16:27 3,782,048
WinSetupBoot.sys 10.0.19041.6800 9-Dec-25 16:27 76,200
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 182,784
For all supported ARM64-based versions
File name File version Date Time File size
acmigration.dll 10.0.19041.6800 9-Dec-25 16:27 672,128
AcRes.dll 10.0.19041.6800 9-Dec-25 16:27 333,720
Appraiser.dll 10.0.19041.6800 9-Dec-25 16:27 2,301,856
appraiser.sdb Not versioned 9-Dec-25 16:27 1,947,750
AppraiserRes.dll 10.0.19041.6800 9-Dec-25 16:27 215,448
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 323,072
cmi2migxml.dll 10.0.19041.6800 9-Dec-25 16:27 205,224
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 347,136
csiagent.dll 10.0.19041.6800 9-Dec-25 16:27 765,856
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 338,432
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 377,856
diagtrack.dll 10.0.10586.0 9-Dec-25 16:27 1,561,952
Dism.exe 10.0.19041.6800 9-Dec-25 16:27 322,448
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 394,752
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 372,224
Facilitator.dll 10.0.19041.6800 9-Dec-25 16:27 1,091,984
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 342,016
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 376,320
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 368,640
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 237,056
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 224,768
MediaSetupUIMgr.dll 10.0.19041.6800 9-Dec-25 16:27 14,053,792
migcore.dll 10.0.19041.6800 9-Dec-25 16:27 9,860,000
mighost.exe 10.0.19041.6800 9-Dec-25 16:27 262,544
migisol.dll 10.0.19041.6800 9-Dec-25 16:27 141,184
migres.dll 10.0.19041.6800 9-Dec-25 16:27 17,320
MigStore.dll 10.0.19041.6800 9-Dec-25 16:27 1,398,688
MigSys.dll 10.0.19041.6800 9-Dec-25 16:27 466,304
Mitigation.dll 10.0.19041.6800 9-Dec-25 16:27 399,760
MXEAgent.dll 10.0.19041.6800 9-Dec-25 16:27 380,288
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 339,456
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 380,928
offline.xml Not versioned 9-Dec-25 16:27 38,899
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 383,488
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 356,352
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 358,400
ReAgent.dll 10.0.19041.6800 9-Dec-25 16:27 1,190,800
AppXDeploymentServer-Replacement.man Not versioned 9-Dec-25 16:27 4,900
EdgeMigrationPlugin.man Not versioned 9-Dec-25 16:27 923
edpnotify-replacement.man Not versioned 9-Dec-25 16:27 830
fveApi-replacement.man Not versioned 9-Dec-25 16:27 1,101
Edge.dat Not versioned 9-Dec-25 16:27 12,288
EdgeMigrationPlugin.dll 1.0.0.1 9-Dec-25 16:27 122,240
EdgeUpdate.dat Not versioned 9-Dec-25 16:27 12,288
microsoft-hyper-v-migration-replacement.man Not versioned 9-Dec-25 16:27 6,088
TileStoreMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 133,016
AppxUpgradeMigrationPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 502,144
iismig.dll 10.0.19041.6800 9-Dec-25 16:27 391,040
SxsMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 144,256
VsmKeyMigPlugin.dll 10.0.19041.6800 9-Dec-25 16:27 92,072
PPIPolicies-General-Replacement.man Not versioned 9-Dec-25 16:27 2,161
PPIPolicies-Miracast-Replacement.man Not versioned 9-Dec-25 16:27 1,352
StartTileData-Replacement.man Not versioned 9-Dec-25 16:27 2,702
tcblaunch-replacement.man Not versioned 9-Dec-25 16:27 1,902
ReserveManager.dll 10.0.19041.6800 9-Dec-25 16:27 300,960
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 355,840
Setup.exe 10.0.19041.6800 9-Dec-25 16:27 297,344
setupcompat.dll 10.0.19041.6800 9-Dec-25 16:27 372,640
SetupCore.dll 10.0.19041.6800 9-Dec-25 16:27 2,408,344
SetupHost.exe 10.0.19041.6800 9-Dec-25 16:27 903,568
SetupMgr.dll 10.0.19041.6800 9-Dec-25 16:27 1,040,768
SetupPlatform.dll 1.60.19041.6800 9-Dec-25 16:27 10,372,512
SetupPlatform.exe 1.60.19041.6800 9-Dec-25 16:27 175,000
SetupPrep.exe 10.0.19041.6800 9-Dec-25 16:27 10,918,816
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 348,672
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 336,384
unbcl.dll 10.0.19041.6800 9-Dec-25 16:27 1,151,360
uninstall.xml Not versioned 9-Dec-25 16:27 3,508
UpdateAgent.dll 10.0.19041.6800 9-Dec-25 16:27 3,010,464
upgrade_bulk.xml Not versioned 9-Dec-25 16:27 208,513
upgradeagent.dll 10.0.19041.6800 9-Dec-25 16:27 3,356,048
WinDlp.dll 10.0.19041.6800 9-Dec-25 16:27 1,491,288
winsetup.dll 10.0.19041.6800 9-Dec-25 16:27 3,825,536
WinSetupBoot.sys 10.0.19041.6800 9-Dec-25 16:27 76,160
AcRes.dll.mui 10.0.19041.6800 9-Dec-25 16:27 182,784

References

Update Windows installation media with Dynamic Update

Description of the standard terminology that is used to describe Microsoft software updates