Applies To
Windows Server 2016

Windows Secure Boot certificate expiration 

Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.

Support for Windows Server 2016 will end in January 2027

After January 12, 2027, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows Server 2016. We recommend that you upgrade to a later version of Windows Server.

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 KB5066584.

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.

File name

File version

Date

Time

File size

luainstall.dll

10.0.14393.8590

14-Oct-25

14:36

52,672

appxreg.dll

10.0.14393.8590

14-Oct-25

14:36

37,824

appxprovisionpackage.dll

10.0.14393.8590

14-Oct-25

14:36

78,800

EventsInstaller.dll

10.0.14393.8590

14-Oct-25

14:36

178,128

CntrtextInstaller.dll

10.0.14393.8590

14-Oct-25

14:36

141,248

grouptrusteeai.dll

10.0.14393.8590

14-Oct-25

14:36

39,872

sppinst.dll

10.0.14393.8590

14-Oct-25

14:36

38,336

timezoneai.dll

10.0.14393.8590

14-Oct-25

14:36

60,864

httpai.dll

10.0.14393.8590

14-Oct-25

14:36

29,136

cmifw.dll

10.0.14393.8590

14-Oct-25

14:36

91,584

FirewallOfflineAPI.dll

10.0.14393.8590

14-Oct-25

14:36

162,752

NetSetupAI.dll

10.0.14393.8590

14-Oct-25

14:36

105,424

NetSetupApi.dll

10.0.14393.8590

14-Oct-25

14:36

113,104

NetSetupEngine.dll

10.0.14393.8590

14-Oct-25

14:36

607,680

ImplatSetup.dll

10.0.14393.8590

14-Oct-25

14:36

102,336

winsockai.dll

10.0.14393.8590

14-Oct-25

14:36

74,688

ws2_helper.dll

10.0.14393.8590

14-Oct-25

14:36

79,808

wmicmiplugin.dll

10.0.14393.8590

14-Oct-25

14:36

274,368

offlinelsa.dll

10.0.14393.8590

14-Oct-25

14:36

112,064

offlinesam.dll

10.0.14393.8590

14-Oct-25

14:36

235,456

poqexec.exe.mui

10.0.14393.8590

14-Oct-25

14:36

3,072

mofinstall.dll

10.0.14393.8590

14-Oct-25

14:36

73,664

esscli.dll

10.0.14393.8590

14-Oct-25

14:36

300,992

mofd.dll

10.0.14393.8590

14-Oct-25

14:36

208,832

repdrvfs.dll

10.0.14393.8590

14-Oct-25

14:36

283,584

fastprox.dll

10.0.14393.8590

14-Oct-25

14:36

671,184

wbemcomn.dll

10.0.14393.8590

14-Oct-25

14:36

389,568

wbemcore.dll

10.0.14393.8590

14-Oct-25

14:36

985,552

wmiutils.dll

10.0.14393.8590

14-Oct-25

14:36

99,792

wbemprox.dll

10.0.14393.8590

14-Oct-25

14:36

37,824

shtransform.dll

10.0.14393.8590

14-Oct-25

14:36

34,240

bfsvc.dll

10.0.14393.8590

14-Oct-25

14:36

181,696

securebootai.dll

10.0.14393.8590

14-Oct-25

14:36

283,584

fveupdateai.dll

10.0.14393.8590

14-Oct-25

14:36

29,120

cmitrust.dll

10.0.14393.8590

14-Oct-25

14:36

276,928

peerdistai.dll

10.0.14393.8590

14-Oct-25

14:36

33,744

PrintAdvancedInstaller.dll

10.0.14393.8590

14-Oct-25

14:36

94,656

msdtcadvancedinstaller.dll

10.0.14393.8590

14-Oct-25

14:36

56,256

netfxconfig.dll

10.0.14393.8590

14-Oct-25

14:36

28,608

ConfigureIEOptionalComponentsAI.dll

10.0.14393.8590

14-Oct-25

14:36

48,064

IEFileInstallAI.dll

10.0.14393.8590

14-Oct-25

14:36

36,816

servicemodelregai.dll

10.0.14393.8590

14-Oct-25

14:36

74,176

SetIEInstalledDateAI.dll

10.0.14393.8590

14-Oct-25

14:36

24,000

bcdeditai.dll

10.0.14393.8590

14-Oct-25

14:36

273,360

FeatureSettingsOverride.dll

10.0.14393.8590

14-Oct-25

14:36

35,776

SupplementalServicingAI.dll

10.0.14393.8590

14-Oct-25

14:36

17,920

PrimitiveTransformers.dll

10.0.14393.8590

14-Oct-25

14:36

52,672

AriTransformer.dll

10.0.14393.8590

14-Oct-25

14:36

51,136

WpnDataTransformer.dll

10.0.14393.8590

14-Oct-25

14:36

31,696

mqcmiplugin.dll

5.0.1.1

14-Oct-25

14:36

132,048

wdscore.dll

10.0.14393.8590

14-Oct-25

14:36

221,120

drvstore.dll

10.0.14393.8590

14-Oct-25

14:36

751,552

dpx.dll

5.0.1.1

14-Oct-25

14:36

382,400

msdelta.dll

5.0.1.1

14-Oct-25

14:36

408,000

mspatcha.dll

5.0.1.1

14-Oct-25

14:36

46,016

cmiaisupport.dll

10.0.14393.8590

14-Oct-25

14:36

1,915,328

WcmTypes.xsd

Not versioned

14-Oct-25

14:36

1,047

CbsMsg.dll

10.0.14393.8590

14-Oct-25

14:36

50,624

CbsCore.dll

10.0.14393.8590

14-Oct-25

14:36

1,791,936

TiWorker.exe

10.0.14393.8590

14-Oct-25

14:36

197,120

TiFileFetcher.exe

10.0.14393.8590

14-Oct-25

14:36

247,760

drupdate.dll

10.0.14393.8590

14-Oct-25

14:36

287,184

wcp.dll

10.0.14393.8590

14-Oct-25

14:36

2,738,624

cmiadapter.dll

10.0.14393.8590

14-Oct-25

14:36

74,192

smiengine.dll

10.0.14393.8590

14-Oct-25

14:36

748,480

smipi.dll

10.0.14393.8590

14-Oct-25

14:36

33,216

poqexec.exe

10.0.14393.8590

14-Oct-25

14:36

120,320

x86_installed

Not versioned

14-Oct-25

14:36

9

GlobalInstallOrder.xml

Not versioned

14-Oct-25

14:36

1,247,706

wrpint.dll

10.0.14393.8590

14-Oct-25

14:36

68,032

iissetupai.dll

10.0.14393.8590

14-Oct-25

14:36

99,776

cleanupai.dll

10.0.14393.8590

14-Oct-25

14:36

22,976

File name

File version

Date

Time

File size

luainstall.dll

10.0.14393.8590

14-Oct-25

15:28

61,392

appxreg.dll

10.0.14393.8590

14-Oct-25

15:28

43,984

appxprovisionpackage.dll

10.0.14393.8590

14-Oct-25

15:28

88,000

EventsInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

223,696

CntrtextInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

164,288

grouptrusteeai.dll

10.0.14393.8590

14-Oct-25

15:28

44,992

sppinst.dll

10.0.14393.8590

14-Oct-25

15:28

43,472

timezoneai.dll

10.0.14393.8590

14-Oct-25

15:28

71,616

httpai.dll

10.0.14393.8590

14-Oct-25

15:28

32,192

cmifw.dll

10.0.14393.8590

14-Oct-25

15:28

102,848

FirewallOfflineAPI.dll

10.0.14393.8590

14-Oct-25

15:28

185,808

NetSetupAI.dll

10.0.14393.8590

14-Oct-25

15:28

133,576

NetSetupApi.dll

10.0.14393.8590

14-Oct-25

15:28

149,952

NetSetupEngine.dll

10.0.14393.8590

14-Oct-25

15:28

859,584

ImplatSetup.dll

10.0.14393.8590

14-Oct-25

15:28

137,152

winsockai.dll

10.0.14393.8590

14-Oct-25

15:28

83,392

ws2_helper.dll

10.0.14393.8590

14-Oct-25

15:28

95,680

wmicmiplugin.dll

10.0.14393.8590

14-Oct-25

15:28

395,712

offlinelsa.dll

10.0.14393.8590

14-Oct-25

15:28

124,352

offlinesam.dll

10.0.14393.8590

14-Oct-25

15:28

262,096

poqexec.exe.mui

10.0.14393.8590

14-Oct-25

15:28

3,072

mofinstall.dll

10.0.14393.8590

14-Oct-25

15:28

74,688

esscli.dll

10.0.14393.8590

14-Oct-25

15:28

398,784

mofd.dll

10.0.14393.8590

14-Oct-25

15:28

247,232

repdrvfs.dll

10.0.14393.8590

14-Oct-25

15:28

353,728

fastprox.dll

10.0.14393.8590

14-Oct-25

15:28

856,512

wbemcomn.dll

10.0.14393.8590

14-Oct-25

15:28

453,056

wbemcore.dll

10.0.14393.8590

14-Oct-25

15:28

1,230,784

wmiutils.dll

10.0.14393.8590

14-Oct-25

15:28

120,256

wbemprox.dll

10.0.14393.8590

14-Oct-25

15:28

43,968

shtransform.dll

10.0.14393.8590

14-Oct-25

15:28

39,888

bfsvc.dll

10.0.14393.8590

14-Oct-25

15:28

210,880

securebootai.dll

10.0.14393.8590

14-Oct-25

15:28

331,200

fveupdateai.dll

10.0.14393.8590

14-Oct-25

15:28

33,728

cmitrust.dll

10.0.14393.8590

14-Oct-25

15:28

401,344

peerdistai.dll

10.0.14393.8590

14-Oct-25

15:28

39,376

PrintAdvancedInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

103,872

msdtcadvancedinstaller.dll

10.0.14393.8590

14-Oct-25

15:28

65,984

netfxconfig.dll

10.0.14393.8590

14-Oct-25

15:28

31,680

ConfigureIEOptionalComponentsAI.dll

10.0.14393.8590

14-Oct-25

15:28

54,720

IEFileInstallAI.dll

10.0.14393.8590

14-Oct-25

15:28

38,352

servicemodelregai.dll

10.0.14393.8590

14-Oct-25

15:28

89,536

SetIEInstalledDateAI.dll

10.0.14393.8590

14-Oct-25

15:28

25,552

bcdeditai.dll

10.0.14393.8590

14-Oct-25

15:28

297,408

FeatureSettingsOverride.dll

10.0.14393.8590

14-Oct-25

15:28

41,408

SupplementalServicingAI.dll

10.0.14393.8590

14-Oct-25

15:28

18,432

PrimitiveTransformers.dll

10.0.14393.8590

14-Oct-25

15:28

67,008

AriTransformer.dll

10.0.14393.8590

14-Oct-25

15:28

57,808

WpnDataTransformer.dll

10.0.14393.8590

14-Oct-25

15:28

38,352

mqcmiplugin.dll

5.0.1.1

14-Oct-25

15:28

155,600

appserverai.dll

10.0.14393.8590

14-Oct-25

15:28

115,136

RDWebAI.dll

10.0.14393.8590

14-Oct-25

15:28

120,784

tssdisai.dll

10.0.14393.8590

14-Oct-25

15:28

122,816

VmHostAI.dll

10.0.14393.8590

14-Oct-25

15:28

101,312

wdscore.dll

10.0.14393.8590

14-Oct-25

15:28

268,224

drvstore.dll

10.0.14393.8590

14-Oct-25

15:28

909,776

dpx.dll

5.0.1.1

14-Oct-25

15:28

508,880

msdelta.dll

5.0.1.1

14-Oct-25

15:28

516,032

mspatcha.dll

5.0.1.1

14-Oct-25

15:28

55,232

cmiaisupport.dll

10.0.14393.8590

14-Oct-25

15:28

2,924,992

WcmTypes.xsd

Not versioned

14-Oct-25

15:28

1,047

CbsMsg.dll

10.0.14393.8590

14-Oct-25

15:28

51,648

CbsCore.dll

10.0.14393.8590

14-Oct-25

15:28

2,042,832

TiWorker.exe

10.0.14393.8590

14-Oct-25

15:28

199,680

TiFileFetcher.exe

10.0.14393.8590

14-Oct-25

15:28

290,256

drupdate.dll

10.0.14393.8590

14-Oct-25

15:28

337,344

wcp.dll

10.0.14393.8590

14-Oct-25

15:28

3,202,512

cmiadapter.dll

10.0.14393.8590

14-Oct-25

15:28

85,952

smiengine.dll

10.0.14393.8590

14-Oct-25

15:28

865,728

smipi.dll

10.0.14393.8590

14-Oct-25

15:28

37,824

poqexec.exe

10.0.14393.8590

14-Oct-25

15:28

142,848

amd64_installed

Not versioned

14-Oct-25

15:28

9

GlobalInstallOrder.xml

Not versioned

14-Oct-25

15:28

1,247,706

wrpint.dll

10.0.14393.8590

14-Oct-25

15:28

77,776

iissetupai.dll

10.0.14393.8590

14-Oct-25

15:28

123,840

cleanupai.dll

10.0.14393.8590

14-Oct-25

15:28

25,024

luainstall.dll

10.0.14393.8590

14-Oct-25

15:28

52,672

appxreg.dll

10.0.14393.8590

14-Oct-25

15:28

37,824

appxprovisionpackage.dll

10.0.14393.8590

14-Oct-25

15:28

78,800

EventsInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

178,128

CntrtextInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

141,248

grouptrusteeai.dll

10.0.14393.8590

14-Oct-25

15:28

39,872

sppinst.dll

10.0.14393.8590

14-Oct-25

15:28

38,336

timezoneai.dll

10.0.14393.8590

14-Oct-25

15:28

60,864

httpai.dll

10.0.14393.8590

14-Oct-25

15:28

29,136

cmifw.dll

10.0.14393.8590

14-Oct-25

15:28

91,584

FirewallOfflineAPI.dll

10.0.14393.8590

14-Oct-25

15:28

162,752

NetSetupAI.dll

10.0.14393.8590

14-Oct-25

15:28

105,424

NetSetupApi.dll

10.0.14393.8590

14-Oct-25

15:28

113,104

NetSetupEngine.dll

10.0.14393.8590

14-Oct-25

15:28

607,680

ImplatSetup.dll

10.0.14393.8590

14-Oct-25

15:28

102,336

winsockai.dll

10.0.14393.8590

14-Oct-25

15:28

74,688

ws2_helper.dll

10.0.14393.8590

14-Oct-25

15:28

79,808

wmicmiplugin.dll

10.0.14393.8590

14-Oct-25

15:28

274,368

mofinstall.dll

10.0.14393.8590

14-Oct-25

15:28

73,664

esscli.dll

10.0.14393.8590

14-Oct-25

15:28

300,992

mofd.dll

10.0.14393.8590

14-Oct-25

15:28

208,832

repdrvfs.dll

10.0.14393.8590

14-Oct-25

15:28

283,584

fastprox.dll

10.0.14393.8590

14-Oct-25

15:28

671,184

wbemcomn.dll

10.0.14393.8590

14-Oct-25

15:28

389,568

wbemcore.dll

10.0.14393.8590

14-Oct-25

15:28

985,552

wmiutils.dll

10.0.14393.8590

14-Oct-25

15:28

99,792

wbemprox.dll

10.0.14393.8590

14-Oct-25

15:28

37,824

shtransform.dll

10.0.14393.8590

14-Oct-25

15:28

34,240

bfsvc.dll

10.0.14393.8590

14-Oct-25

15:28

181,696

securebootai.dll

10.0.14393.8590

14-Oct-25

15:28

283,584

fveupdateai.dll

10.0.14393.8590

14-Oct-25

15:28

29,120

cmitrust.dll

10.0.14393.8590

14-Oct-25

15:28

276,928

peerdistai.dll

10.0.14393.8590

14-Oct-25

15:28

33,744

PrintAdvancedInstaller.dll

10.0.14393.8590

14-Oct-25

15:28

94,656

msdtcadvancedinstaller.dll

10.0.14393.8590

14-Oct-25

15:28

56,256

netfxconfig.dll

10.0.14393.8590

14-Oct-25

15:28

28,608

ConfigureIEOptionalComponentsAI.dll

10.0.14393.8590

14-Oct-25

15:28

48,064

IEFileInstallAI.dll

10.0.14393.8590

14-Oct-25

15:28

36,816

servicemodelregai.dll

10.0.14393.8590

14-Oct-25

15:28

74,176

SetIEInstalledDateAI.dll

10.0.14393.8590

14-Oct-25

15:28

24,000

bcdeditai.dll

10.0.14393.8590

14-Oct-25

15:28

273,360

FeatureSettingsOverride.dll

10.0.14393.8590

14-Oct-25

15:28

35,776

SupplementalServicingAI.dll

10.0.14393.8590

14-Oct-25

15:28

17,920

PrimitiveTransformers.dll

10.0.14393.8590

14-Oct-25

15:28

52,672

AriTransformer.dll

10.0.14393.8590

14-Oct-25

15:28

51,136

WpnDataTransformer.dll

10.0.14393.8590

14-Oct-25

15:28

31,696

appserverai.dll

10.0.14393.8590

14-Oct-25

15:28

94,656

RDWebAI.dll

10.0.14393.8590

14-Oct-25

15:28

104,896

tssdisai.dll

10.0.14393.8590

14-Oct-25

15:28

103,376

VmHostAI.dll

10.0.14393.8590

14-Oct-25

15:28

84,432

wdscore.dll

10.0.14393.8590

14-Oct-25

15:28

221,120

drvstore.dll

10.0.14393.8590

14-Oct-25

15:28

751,552

dpx.dll

5.0.1.1

14-Oct-25

15:28

382,400

msdelta.dll

5.0.1.1

14-Oct-25

15:28

408,000

mspatcha.dll

5.0.1.1

14-Oct-25

15:28

46,016

cmiaisupport.dll

10.0.14393.8590

14-Oct-25

15:28

1,915,328

CbsMsg.dll

10.0.14393.8590

14-Oct-25

15:28

50,624

CbsCore.dll

10.0.14393.8590

14-Oct-25

15:28

1,791,936

TiWorker.exe

10.0.14393.8590

14-Oct-25

15:28

197,120

TiFileFetcher.exe

10.0.14393.8590

14-Oct-25

15:28

247,760

drupdate.dll

10.0.14393.8590

14-Oct-25

15:28

287,184

wcp.dll

10.0.14393.8590

14-Oct-25

15:28

2,738,624

cmiadapter.dll

10.0.14393.8590

14-Oct-25

15:28

74,192

smiengine.dll

10.0.14393.8590

14-Oct-25

15:28

748,480

smipi.dll

10.0.14393.8590

14-Oct-25

15:28

33,216

poqexec.exe

10.0.14393.8590

14-Oct-25

15:28

120,320

x86_installed

Not versioned

14-Oct-25

15:28

9

wrpint.dll

10.0.14393.8590

14-Oct-25

15:28

68,032

cleanupai.dll

10.0.14393.8590

14-Oct-25

15:28

22,976

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

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