KB5066587: Servicing stack update for Windows 10: October 14, 2025

Applies To
Windows 10 Win 10 IoT Ent LTSB 2015

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.
End of support information

Note

  • Support for Windows 10 has ended on October 14, 2025
  • After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend moving to Windows 11.
  • Learn more

Summary

This servicing stack update (SSU) makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates make sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

Important Not installing the latest SSU before applying Windows updates might result in the Windows update not being offered until the latest SSU is installed.

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 don't have to restart your computer after you apply this update.
Removal information Servicing stack updates (SSUs) make changes to how updates are installed and cannot be uninstalled from the device.
Update replacement information This update replaces the previously released update KB5065766.

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
NetworkBindingEngineTransformer.dll 10.0.10240.21155 19-Sep-25 13:24 201,216
NetSetupApi.dll 10.0.10240.21155 19-Sep-25 13:24 79,336
peerdistai.dll 10.0.10240.21155 19-Sep-25 13:24 24,064
PrintAdvancedInstaller.dll 10.0.10240.21155 19-Sep-25 13:24 84,992
msdtcadvancedinstaller.dll 10.0.10240.21155 19-Sep-25 13:24 47,104
netfxconfig.dll 10.0.10240.21155 19-Sep-25 13:24 18,944
ConfigureIEOptionalComponentsAI.dll 10.0.10240.21155 19-Sep-25 13:24 38,400
IEFileInstallAI.dll 10.0.10240.21155 19-Sep-25 13:24 27,136
servicemodelregai.dll 10.0.10240.21155 19-Sep-25 13:24 64,512
SetIEInstalledDateAI.dll 10.0.10240.21155 19-Sep-25 13:24 14,336
bcdeditai.dll 10.0.10240.21155 19-Sep-25 13:24 259,584
RegisterIEPKeysAI.dll 10.0.10240.21155 19-Sep-25 13:24 13,824
cmipnpinstall.dll 10.0.10240.21155 19-Sep-25 13:24 194,496
FeatureSettingsOverride.dll 10.0.10240.21155 19-Sep-25 13:24 25,088
PrimitiveTransformers.dll 10.0.10240.21155 19-Sep-25 13:24 43,008
WpnDataTransformer.dll 10.0.10240.21155 19-Sep-25 13:24 20,992
AriTransformer.dll 10.0.10240.21155 19-Sep-25 13:24 37,376
mqcmiplugin.dll 10.0.10240.21155 19-Sep-25 13:24 122,880
wdscore.dll 10.0.10240.21155 19-Sep-25 13:24 208,320
drvstore.dll 10.0.10240.21155 19-Sep-25 13:24 701,392
dpx.dll 10.0.10240.21155 19-Sep-25 13:24 371,712
msdelta.dll 10.0.10240.21155 19-Sep-25 13:24 410,624
mspatcha.dll 10.0.10240.21155 19-Sep-25 13:24 36,864
cmiaisupport.dll 10.0.10240.21155 19-Sep-25 13:24 2,169,816
WcmTypes.xsd Not versioned 19-Sep-25 13:24 1,047
CbsMsg.dll 10.0.10240.21155 19-Sep-25 13:24 50,648
CbsCore.dll 10.0.10240.21155 19-Sep-25 13:24 1,779,712
TiWorker.exe 10.0.10240.21155 19-Sep-25 13:24 197,120
TiFileFetcher.exe 10.0.10240.21155 19-Sep-25 13:24 234,432
DrUpdate.dll 10.0.10240.21155 19-Sep-25 13:24 284,608
wrpint.dll 10.0.10240.21155 19-Sep-25 13:24 55,808
wcp.dll 10.0.10240.21155 19-Sep-25 13:24 2,718,208
cmiadapter.dll 10.0.10240.21155 19-Sep-25 13:24 64,512
smiengine.dll 10.0.10240.21155 19-Sep-25 13:24 730,112
smipi.dll 10.0.10240.21155 19-Sep-25 13:24 23,552
poqexec.exe 10.0.10240.21155 19-Sep-25 13:24 118,272
x86_installed Not versioned 19-Sep-25 13:24 9
GlobalInstallOrder.xml Not versioned 19-Sep-25 13:24 1,249,165
EventsInstaller.dll 10.0.10240.21155 19-Sep-25 13:24 166,912
mofinstall.dll 10.0.10240.21155 19-Sep-25 13:24 63,488
esscli.dll 10.0.10240.21155 19-Sep-25 13:24 299,008
mofd.dll 10.0.10240.21155 19-Sep-25 13:24 203,264
repdrvfs.dll 10.0.10240.21155 19-Sep-25 13:24 277,504
fastprox.dll 10.0.10240.21155 19-Sep-25 13:24 669,696
wbemcomn.dll 10.0.10240.21155 19-Sep-25 13:24 385,536
wbemcore.dll 10.0.10240.21155 19-Sep-25 13:24 922,112
wmiutils.dll 10.0.10240.21155 19-Sep-25 13:24 91,136
wbemprox.dll 10.0.10240.21155 19-Sep-25 13:24 30,208
wmicmiplugin.dll 10.0.10240.21155 19-Sep-25 13:24 272,384
httpai.dll 10.0.10240.21155 19-Sep-25 13:24 16,896
securebootai.dll 10.0.10240.21155 19-Sep-25 13:24 179,712
winsockai.dll 10.0.10240.21155 19-Sep-25 13:24 65,536
ws2_helper.dll 10.0.10240.21155 19-Sep-25 13:24 69,632
cleanupai.dll 10.0.10240.21155 19-Sep-25 13:24 12,800
CntrtextInstaller.dll 10.0.10240.21155 19-Sep-25 13:24 128,000
cmitrust.dll 10.0.10240.21155 19-Sep-25 13:24 289,752
bfsvc.dll 10.0.10240.21155 19-Sep-25 13:24 65,024
timezoneai.dll 10.0.10240.21155 19-Sep-25 13:24 51,200
luainstall.dll 10.0.10240.21155 19-Sep-25 13:24 42,496
fveupdateai.dll 10.0.10240.21155 19-Sep-25 13:24 18,944
appxprovisionpackage.dll 10.0.10240.21155 19-Sep-25 13:24 63,488
grouptrusteeai.dll 10.0.10240.21155 19-Sep-25 13:24 39,400
appxreg.dll 10.0.10240.21155 19-Sep-25 13:24 24,064
sppinst.dll 10.0.10240.21155 19-Sep-25 13:24 647,168
offlinelsa.dll 10.0.10240.21155 19-Sep-25 13:24 100,864
offlinesam.dll 10.0.10240.21155 19-Sep-25 13:24 110,080
cmifw.dll 10.0.10240.21155 19-Sep-25 13:24 80,896
FirewallOfflineAPI.dll 10.0.10240.21155 19-Sep-25 13:24 147,968
NetSetupAI.dll 10.0.10240.21155 19-Sep-25 13:24 79,360
NetSetupEngine.dll 10.0.10240.21155 19-Sep-25 13:24 469,976
ImplatSetup.dll 10.0.10240.21155 19-Sep-25 13:24 54,784
For all supported x64-based versions
File name File version Date Time File size
NetworkBindingEngineTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 304,640
NetSetupApi.dll 10.0.10240.21155 19-Sep-25 14:14 104,920
peerdistai.dll 10.0.10240.21155 19-Sep-25 14:14 30,208
PrintAdvancedInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 98,304
msdtcadvancedinstaller.dll 10.0.10240.21155 19-Sep-25 14:14 58,880
netfxconfig.dll 10.0.10240.21155 19-Sep-25 14:14 22,528
ConfigureIEOptionalComponentsAI.dll 10.0.10240.21155 19-Sep-25 14:14 46,592
IEFileInstallAI.dll 10.0.10240.21155 19-Sep-25 14:14 29,184
servicemodelregai.dll 10.0.10240.21155 19-Sep-25 14:14 80,896
SetIEInstalledDateAI.dll 10.0.10240.21155 19-Sep-25 14:14 16,384
bcdeditai.dll 10.0.10240.21155 19-Sep-25 14:14 283,648
RegisterIEPKeysAI.dll 10.0.10240.21155 19-Sep-25 14:14 16,384
cmipnpinstall.dll 10.0.10240.21155 19-Sep-25 14:14 246,720
FeatureSettingsOverride.dll 10.0.10240.21155 19-Sep-25 14:14 31,744
PrimitiveTransformers.dll 10.0.10240.21155 19-Sep-25 14:14 58,368
WpnDataTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 27,648
AriTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 50,688
mqcmiplugin.dll 10.0.10240.21155 19-Sep-25 14:14 149,504
appserverai.dll 10.0.10240.21155 19-Sep-25 14:14 109,056
RDWebAI.dll 10.0.10240.21155 19-Sep-25 14:14 113,152
tssdisai.dll 10.0.10240.21155 19-Sep-25 14:14 116,224
VmHostAI.dll 10.0.10240.21155 19-Sep-25 14:14 93,696
wdscore.dll 10.0.10240.21155 19-Sep-25 14:14 255,960
drvstore.dll 10.0.10240.21155 19-Sep-25 14:14 851,408
dpx.dll 10.0.10240.21155 19-Sep-25 14:14 498,688
msdelta.dll 10.0.10240.21155 19-Sep-25 14:14 515,072
mspatcha.dll 10.0.10240.21155 19-Sep-25 14:14 46,080
cmiaisupport.dll 10.0.10240.21155 19-Sep-25 14:14 3,171,816
WcmTypes.xsd Not versioned 19-Sep-25 14:14 1,047
CbsMsg.dll 10.0.10240.21155 19-Sep-25 14:14 51,648
CbsCore.dll 10.0.10240.21155 19-Sep-25 14:14 1,970,176
TiWorker.exe 10.0.10240.21155 19-Sep-25 14:14 200,192
TiFileFetcher.exe 10.0.10240.21155 19-Sep-25 14:14 277,464
DrUpdate.dll 10.0.10240.21155 19-Sep-25 14:14 341,976
wrpint.dll 10.0.10240.21155 19-Sep-25 14:14 66,048
wcp.dll 10.0.10240.21155 19-Sep-25 14:14 3,231,232
cmiadapter.dll 10.0.10240.21155 19-Sep-25 14:14 80,384
smiengine.dll 10.0.10240.21155 19-Sep-25 14:14 898,048
smipi.dll 10.0.10240.21155 19-Sep-25 14:14 29,184
poqexec.exe 10.0.10240.21155 19-Sep-25 14:14 141,824
amd64_installed Not versioned 19-Sep-25 14:14 9
GlobalInstallOrder.xml Not versioned 19-Sep-25 14:14 1,249,165
EventsInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 214,016
mofinstall.dll 10.0.10240.21155 19-Sep-25 14:14 67,584
esscli.dll 10.0.10240.21155 19-Sep-25 14:14 402,432
mofd.dll 10.0.10240.21155 19-Sep-25 14:14 248,320
repdrvfs.dll 10.0.10240.21155 19-Sep-25 14:14 350,208
fastprox.dll 10.0.10240.21155 19-Sep-25 14:14 854,528
wbemcomn.dll 10.0.10240.21155 19-Sep-25 14:14 449,024
wbemcore.dll 10.0.10240.21155 19-Sep-25 14:14 1,147,392
wmiutils.dll 10.0.10240.21155 19-Sep-25 14:14 112,128
wbemprox.dll 10.0.10240.21155 19-Sep-25 14:14 36,864
wmicmiplugin.dll 10.0.10240.21155 19-Sep-25 14:14 340,992
httpai.dll 10.0.10240.21155 19-Sep-25 14:14 19,968
securebootai.dll 10.0.10240.21155 19-Sep-25 14:14 205,312
winsockai.dll 10.0.10240.21155 19-Sep-25 14:14 73,216
ws2_helper.dll 10.0.10240.21155 19-Sep-25 14:14 83,456
cleanupai.dll 10.0.10240.21155 19-Sep-25 14:14 15,360
CntrtextInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 153,600
cmitrust.dll 10.0.10240.21155 19-Sep-25 14:14 423,360
bfsvc.dll 10.0.10240.21155 19-Sep-25 14:14 75,776
timezoneai.dll 10.0.10240.21155 19-Sep-25 14:14 67,584
luainstall.dll 10.0.10240.21155 19-Sep-25 14:14 52,736
fveupdateai.dll 10.0.10240.21155 19-Sep-25 14:14 24,064
appxprovisionpackage.dll 10.0.10240.21155 19-Sep-25 14:14 74,752
grouptrusteeai.dll 10.0.10240.21155 19-Sep-25 14:14 45,008
appxreg.dll 10.0.10240.21155 19-Sep-25 14:14 30,208
sppinst.dll 10.0.10240.21155 19-Sep-25 14:14 769,024
offlinelsa.dll 10.0.10240.21155 19-Sep-25 14:14 114,688
offlinesam.dll 10.0.10240.21155 19-Sep-25 14:14 137,728
cmifw.dll 10.0.10240.21155 19-Sep-25 14:14 96,768
FirewallOfflineAPI.dll 10.0.10240.21155 19-Sep-25 14:14 173,568
NetSetupAI.dll 10.0.10240.21155 19-Sep-25 14:14 105,472
NetSetupEngine.dll 10.0.10240.21155 19-Sep-25 14:14 661,464
ImplatSetup.dll 10.0.10240.21155 19-Sep-25 14:14 78,848
NetworkBindingEngineTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 201,216
NetSetupApi.dll 10.0.10240.21155 19-Sep-25 14:14 79,336
peerdistai.dll 10.0.10240.21155 19-Sep-25 14:14 24,064
PrintAdvancedInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 84,992
msdtcadvancedinstaller.dll 10.0.10240.21155 19-Sep-25 14:14 47,104
netfxconfig.dll 10.0.10240.21155 19-Sep-25 14:14 18,944
ConfigureIEOptionalComponentsAI.dll 10.0.10240.21155 19-Sep-25 14:14 38,400
IEFileInstallAI.dll 10.0.10240.21155 19-Sep-25 14:14 27,136
servicemodelregai.dll 10.0.10240.21155 19-Sep-25 14:14 64,512
SetIEInstalledDateAI.dll 10.0.10240.21155 19-Sep-25 14:14 14,336
bcdeditai.dll 10.0.10240.21155 19-Sep-25 14:14 259,584
RegisterIEPKeysAI.dll 10.0.10240.21155 19-Sep-25 14:14 13,824
cmipnpinstall.dll 10.0.10240.21155 19-Sep-25 14:14 194,496
FeatureSettingsOverride.dll 10.0.10240.21155 19-Sep-25 14:14 25,088
PrimitiveTransformers.dll 10.0.10240.21155 19-Sep-25 14:14 43,008
WpnDataTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 20,992
AriTransformer.dll 10.0.10240.21155 19-Sep-25 14:14 37,376
appserverai.dll 10.0.10240.21155 19-Sep-25 14:14 85,504
RDWebAI.dll 10.0.10240.21155 19-Sep-25 14:14 95,232
tssdisai.dll 10.0.10240.21155 19-Sep-25 14:14 94,208
VmHostAI.dll 10.0.10240.21155 19-Sep-25 14:14 74,752
wdscore.dll 10.0.10240.21155 19-Sep-25 14:14 208,320
drvstore.dll 10.0.10240.21155 19-Sep-25 14:14 701,392
dpx.dll 10.0.10240.21155 19-Sep-25 14:14 371,712
msdelta.dll 10.0.10240.21155 19-Sep-25 14:14 410,624
mspatcha.dll 10.0.10240.21155 19-Sep-25 14:14 36,864
cmiaisupport.dll 10.0.10240.21155 19-Sep-25 14:14 2,169,816
CbsMsg.dll 10.0.10240.21155 19-Sep-25 14:14 50,648
CbsCore.dll 10.0.10240.21155 19-Sep-25 14:14 1,779,712
TiWorker.exe 10.0.10240.21155 19-Sep-25 14:14 197,120
TiFileFetcher.exe 10.0.10240.21155 19-Sep-25 14:14 234,432
DrUpdate.dll 10.0.10240.21155 19-Sep-25 14:14 284,608
wrpint.dll 10.0.10240.21155 19-Sep-25 14:14 55,808
wcp.dll 10.0.10240.21155 19-Sep-25 14:14 2,718,208
cmiadapter.dll 10.0.10240.21155 19-Sep-25 14:14 64,512
smiengine.dll 10.0.10240.21155 19-Sep-25 14:14 730,112
smipi.dll 10.0.10240.21155 19-Sep-25 14:14 23,552
poqexec.exe 10.0.10240.21155 19-Sep-25 14:14 118,272
x86_installed Not versioned 19-Sep-25 14:14 9
EventsInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 166,912
mofinstall.dll 10.0.10240.21155 19-Sep-25 14:14 63,488
esscli.dll 10.0.10240.21155 19-Sep-25 14:14 299,008
mofd.dll 10.0.10240.21155 19-Sep-25 14:14 203,264
repdrvfs.dll 10.0.10240.21155 19-Sep-25 14:14 277,504
fastprox.dll 10.0.10240.21155 19-Sep-25 14:14 669,696
wbemcomn.dll 10.0.10240.21155 19-Sep-25 14:14 385,536
wbemcore.dll 10.0.10240.21155 19-Sep-25 14:14 922,112
wmiutils.dll 10.0.10240.21155 19-Sep-25 14:14 91,136
wbemprox.dll 10.0.10240.21155 19-Sep-25 14:14 30,208
wmicmiplugin.dll 10.0.10240.21155 19-Sep-25 14:14 272,384
httpai.dll 10.0.10240.21155 19-Sep-25 14:14 16,896
securebootai.dll 10.0.10240.21155 19-Sep-25 14:14 179,712
winsockai.dll 10.0.10240.21155 19-Sep-25 14:14 65,536
ws2_helper.dll 10.0.10240.21155 19-Sep-25 14:14 69,632
cleanupai.dll 10.0.10240.21155 19-Sep-25 14:14 12,800
CntrtextInstaller.dll 10.0.10240.21155 19-Sep-25 14:14 128,000
cmitrust.dll 10.0.10240.21155 19-Sep-25 14:14 289,752
bfsvc.dll 10.0.10240.21155 19-Sep-25 14:14 65,024
timezoneai.dll 10.0.10240.21155 19-Sep-25 14:14 51,200
luainstall.dll 10.0.10240.21155 19-Sep-25 14:14 42,496
fveupdateai.dll 10.0.10240.21155 19-Sep-25 14:14 18,944
appxprovisionpackage.dll 10.0.10240.21155 19-Sep-25 14:14 63,488
grouptrusteeai.dll 10.0.10240.21155 19-Sep-25 14:14 39,400
appxreg.dll 10.0.10240.21155 19-Sep-25 14:14 24,064
sppinst.dll 10.0.10240.21155 19-Sep-25 14:14 647,168
offlinelsa.dll 10.0.10240.21155 19-Sep-25 14:14 100,864
offlinesam.dll 10.0.10240.21155 19-Sep-25 14:14 110,080
cmifw.dll 10.0.10240.21155 19-Sep-25 14:14 80,896
FirewallOfflineAPI.dll 10.0.10240.21155 19-Sep-25 14:14 147,968
NetSetupAI.dll 10.0.10240.21155 19-Sep-25 14:14 79,360
NetSetupEngine.dll 10.0.10240.21155 19-Sep-25 14:14 469,976
ImplatSetup.dll 10.0.10240.21155 19-Sep-25 14:14 54,784

References

Servicing stack updates

Servicing Stack Updates (SSU): Frequently Asked Questions

ADV990001 | Latest Servicing Stack Updates

The benefits of Windows 10 Dynamic Update

Updating Windows 10 media with Dynamic Update packages

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