REMINDER

  • Windows 8.1 reached end of support (EOS) on January 10, 2023, at which point technical assistance and software updates are no longer provided. If you have devices running Windows 8.1, we recommend upgrading them to a more current, in-service, and supported Windows release. If devices do not meet the technical requirements to run a more current release of Windows, we recommend that you replace the device with one that supports Windows 11.

    Microsoft will not be offering an Extended Security Update (ESU) program for Windows 8.1. Continuing to use Windows 8.1 after January 10, 2023 may increase an organization’s exposure to security risks or impact its ability to meet compliance obligations. For more information, see Windows 8.1 support will end on January 10, 2023.

    We recommend upgrading to a later version of Windows. For more information, see Upgrade to a later version of Windows.

  • Windows Server 2012 R2 reached end of support (EOS) on October 10, 2023. Extended Security Updates (ESUs) are available for purchase and will continue for three years, renewable on an annual basis, until the final date on October 13, 2026. For more information, see Windows Server End of Support: Key Dates. For information about the procedure to continue receiving security updates, see KB5031043. We recommend upgrading to a later version of Windows Server. For more information, see Learn about upgrading Windows Server.

  • Windows Embedded 8.1 Industry Enterprise and Windows Embedded 8.1 Industry Pro reached end of support (EOS) on July 11, 2023. Therefore, technical assistance and software updates are no longer provided.

Summary

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Additionally, reliability improvements to the secure boot servicing stack were made to help with safe roll out of upcoming security updates for Secure Boot.

Servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

How to get this update

Install this update

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

This update is available through Windows Update. It will be downloaded and installed automatically. 

Microsoft Update Catalog

Yes

To get the standalone package for this update, go to the Microsoft Update Catalog website.

To download updates from the Update Catalog, see Steps to download updates from the Windows Update Catalog.

Windows Server Update Services (WSUS)

Yes

This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows Server 2012 R2

Classification: Security Updates

For more information, see Configure classifications and products to synchronize.

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 KB5034866.

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

File name

File version

Date

Time

File size

httpai.dll

6.3.9600.21864

12-Feb-24

21:47

57,856

peerdistai.dll

6.3.9600.21864

12-Feb-24

21:47

72,192

PrintAdvancedInstaller.dll

6.3.9600.21864

12-Feb-24

22:03

102,400

msdtcadvancedinstaller.dll

6.3.9600.21864

12-Feb-24

21:46

257,536

netfxconfig.dll

6.3.9600.21864

12-Feb-24

22:20

34,816

ConfigureIEOptionalComponentsAI.dll

6.3.9600.21864

12-Feb-24

21:46

84,992

IEFileInstallAI.dll

6.3.9600.21864

12-Feb-24

21:42

68,096

servicemodelregai.dll

6.3.9600.21864

12-Feb-24

21:46

115,200

SetIEInstalledDateAI.dll

6.3.9600.21864

12-Feb-24

21:47

51,712

ceipfwdai.dll

6.3.9600.21864

12-Feb-24

21:42

228,352

bcdeditai.dll

6.3.9600.21864

12-Feb-24

21:49

287,232

appxreg.dll

6.3.9600.21864

12-Feb-24

22:13

14,848

RegisterIEPKeysAI.dll

6.3.9600.21864

12-Feb-24

21:44

19,968

cmipnpinstall.dll

6.3.9600.21864

12-Feb-24

22:18

248,832

appserverai.dll

6.3.9600.21864

12-Feb-24

22:17

146,432

RDWebAI.dll

6.3.9600.21864

12-Feb-24

22:00

140,800

tssdisai.dll

6.3.9600.21864

12-Feb-24

21:58

156,160

VmHostAI.dll

6.3.9600.21864

12-Feb-24

22:03

123,392

securebootai.dll

6.3.9600.21864

12-Feb-24

21:49

97,280

winsockai.dll

6.3.9600.21864

12-Feb-24

21:46

69,632

ws2_helper.dll

6.3.9600.21864

12-Feb-24

21:48

62,976

cleanupai.dll

6.3.9600.21864

12-Feb-24

21:47

33,792

wdscore.dll

6.3.9600.21864

12-Feb-24

21:48

276,480

CntrtextInstaller.dll

6.3.9600.21864

12-Feb-24

21:51

153,088

drvstore.dll

6.3.9600.21864

12-Feb-24

21:51

744,960

dpx.dll

6.3.9600.21864

12-Feb-24

21:41

345,088

msdelta.dll

6.3.9600.21864

12-Feb-24

21:49

499,712

mspatcha.dll

6.3.9600.21864

12-Feb-24

21:52

46,080

cmiv2.dll

6.3.9600.21864

12-Feb-24

22:20

3,300,352

cmiaisupport.dll

6.3.9600.21864

12-Feb-24

21:44

3,154,944

cmitrust.dll

6.3.9600.21864

12-Feb-24

21:48

418,304

WcmTypes.xsd

Not versioned

12-Feb-24

19:34

1,047

CbsMsg.dll

6.3.9600.21864

12-Feb-24

21:52

42,496

CbsCore.dll

6.3.9600.21864

12-Feb-24

21:42

1,609,728

TiWorker.exe

6.3.9600.21864

12-Feb-24

21:48

193,024

TiFileFetcher.exe

6.3.9600.21864

12-Feb-24

21:42

427,520

DrUpdate.dll

6.3.9600.21864

12-Feb-24

21:50

246,784

wrpint.dll

6.3.9600.21864

12-Feb-24

21:42

66,048

wcp.dll

6.3.9600.21864

12-Feb-24

21:50

2,855,424

cmiadapter.dll

6.3.9600.21864

12-Feb-24

21:46

139,264

smiengine.dll

6.3.9600.21864

12-Feb-24

21:36

922,624

smipi.dll

6.3.9600.21864

12-Feb-24

21:48

65,536

poqexec.exe

6.3.9600.21864

12-Feb-24

22:32

146,432

amd64_installed

Not versioned

12-Feb-24

19:17

9

bfsvc.dll

6.3.9600.21864

12-Feb-24

21:43

77,312

timezoneai.dll

6.3.9600.21864

12-Feb-24

21:50

101,888

GlobalInstallOrder.xml

Not versioned

12-Feb-24

19:36

1,249,919

luainstall.dll

6.3.9600.21864

12-Feb-24

21:48

53,248

fveupdateai.dll

6.3.9600.21864

12-Feb-24

21:46

61,952

ExtendedSecurityUpdatesAI.dll

6.3.9600.21864

12-Feb-24

22:17

214,016

mofinstall.dll

6.3.9600.21864

12-Feb-24

21:48

67,072

esscli.dll

6.3.9600.21864

12-Feb-24

21:47

388,608

mofd.dll

6.3.9600.21864

12-Feb-24

21:46

248,320

repdrvfs.dll

6.3.9600.21864

12-Feb-24

21:46

350,720

fastprox.dll

6.3.9600.21864

12-Feb-24

21:46

854,016

wbemcomn.dll

6.3.9600.21864

12-Feb-24

21:48

453,632

wbemcore.dll

6.3.9600.21864

12-Feb-24

21:45

1,148,928

wmiutils.dll

6.3.9600.21864

12-Feb-24

21:48

111,104

wbemprox.dll

6.3.9600.21864

12-Feb-24

21:47

35,840

wmicmiplugin.dll

6.3.9600.21864

12-Feb-24

21:42

508,928

sppinst.dll

6.3.9600.21864

12-Feb-24

21:41

769,024

cmifw.dll

6.3.9600.21864

12-Feb-24

21:45

97,280

FirewallOfflineAPI.dll

6.3.9600.21864

12-Feb-24

21:51

166,912

NetSetupAI.dll

6.3.9600.21864

12-Feb-24

21:49

65,024

NetSetupApi.dll

6.3.9600.21864

12-Feb-24

21:50

184,832

httpai.dll

6.3.9600.21864

12-Feb-24

21:08

55,296

peerdistai.dll

6.3.9600.21864

12-Feb-24

21:08

65,024

PrintAdvancedInstaller.dll

6.3.9600.21864

12-Feb-24

21:18

99,328

msdtcadvancedinstaller.dll

6.3.9600.21864

12-Feb-24

21:07

215,040

netfxconfig.dll

6.3.9600.21864

12-Feb-24

21:30

40,448

ConfigureIEOptionalComponentsAI.dll

6.3.9600.21864

12-Feb-24

21:07

76,800

IEFileInstallAI.dll

6.3.9600.21864

12-Feb-24

21:04

66,560

servicemodelregai.dll

6.3.9600.21864

12-Feb-24

21:07

96,768

SetIEInstalledDateAI.dll

6.3.9600.21864

12-Feb-24

21:08

49,152

ceipfwdai.dll

6.3.9600.21864

12-Feb-24

21:05

197,632

bcdeditai.dll

6.3.9600.21864

12-Feb-24

21:09

271,360

appxreg.dll

6.3.9600.21864

12-Feb-24

21:25

19,968

RegisterIEPKeysAI.dll

6.3.9600.21864

12-Feb-24

21:06

23,040

cmipnpinstall.dll

6.3.9600.21864

12-Feb-24

21:29

195,072

securebootai.dll

6.3.9600.21864

12-Feb-24

21:09

90,624

winsockai.dll

6.3.9600.21864

12-Feb-24

21:07

71,680

ws2_helper.dll

6.3.9600.21864

12-Feb-24

21:09

50,176

cleanupai.dll

6.3.9600.21864

12-Feb-24

21:08

37,376

wdscore.dll

6.3.9600.21864

12-Feb-24

21:08

208,384

CntrtextInstaller.dll

6.3.9600.21864

12-Feb-24

21:10

128,000

drvstore.dll

6.3.9600.21864

12-Feb-24

21:10

610,304

dpx.dll

6.3.9600.21864

12-Feb-24

21:04

265,216

msdelta.dll

6.3.9600.21864

12-Feb-24

21:09

398,336

mspatcha.dll

6.3.9600.21864

12-Feb-24

21:11

36,864

cmiv2.dll

6.3.9600.21864

12-Feb-24

21:30

2,257,408

cmiaisupport.dll

6.3.9600.21864

12-Feb-24

21:06

2,162,688

cmitrust.dll

6.3.9600.21864

12-Feb-24

21:08

286,720

WcmTypes.xsd

Not versioned

29-Dec-23

19:13

1,047

CbsMsg.dll

6.3.9600.21864

12-Feb-24

21:11

41,984

CbsCore.dll

6.3.9600.21864

12-Feb-24

21:05

1,381,376

TiWorker.exe

6.3.9600.21864

12-Feb-24

21:08

190,464

TiFileFetcher.exe

6.3.9600.21864

12-Feb-24

21:05

355,328

DrUpdate.dll

6.3.9600.21864

12-Feb-24

21:10

202,240

wrpint.dll

6.3.9600.21864

12-Feb-24

21:05

56,320

wcp.dll

6.3.9600.21864

12-Feb-24

21:10

2,408,960

cmiadapter.dll

6.3.9600.21864

12-Feb-24

21:07

121,856

smiengine.dll

6.3.9600.21864

12-Feb-24

21:01

750,080

smipi.dll

6.3.9600.21864

12-Feb-24

21:08

59,904

poqexec.exe

6.3.9600.21864

12-Feb-24

21:40

129,536

x86_installed

Not versioned

29-Dec-23

18:57

9

bfsvc.dll

6.3.9600.21864

12-Feb-24

21:06

74,752

timezoneai.dll

6.3.9600.21864

12-Feb-24

21:10

86,528

GlobalInstallOrder.xml

Not versioned

29-Dec-23

19:16

1,249,919

luainstall.dll

6.3.9600.21864

12-Feb-24

21:09

43,008

fveupdateai.dll

6.3.9600.21864

12-Feb-24

21:07

57,344

ExtendedSecurityUpdatesAI.dll

6.3.9600.21864

12-Feb-24

21:28

177,152

mofinstall.dll

6.3.9600.21864

12-Feb-24

21:08

64,000

esscli.dll

6.3.9600.21864

12-Feb-24

21:08

293,376

mofd.dll

6.3.9600.21864

12-Feb-24

21:07

204,800

repdrvfs.dll

6.3.9600.21864

12-Feb-24

21:07

277,504

fastprox.dll

6.3.9600.21864

12-Feb-24

21:07

670,208

wbemcomn.dll

6.3.9600.21864

12-Feb-24

21:08

386,048

wbemcore.dll

6.3.9600.21864

12-Feb-24

21:07

925,696

wmiutils.dll

6.3.9600.21864

12-Feb-24

21:08

90,624

wbemprox.dll

6.3.9600.21864

12-Feb-24

21:08

29,696

wmicmiplugin.dll

6.3.9600.21864

12-Feb-24

21:04

392,704

sppinst.dll

6.3.9600.21864

12-Feb-24

21:04

646,656

cmifw.dll

6.3.9600.21864

12-Feb-24

21:07

80,896

FirewallOfflineAPI.dll

6.3.9600.21864

12-Feb-24

21:10

140,800

NetSetupAI.dll

6.3.9600.21864

12-Feb-24

21:09

55,296

NetSetupApi.dll

6.3.9600.21864

12-Feb-24

21:10

124,928

References

For information on SSUs, see the following articles:

Learn about the standard terminology that is used to describe Microsoft software updates.

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