This update applies to the following:

  • Windows Server 2012 for x86-based systems

  • Windows Server 2012 for x64-based systems

  • Windows Server 2012 (Server Core installation)

Summary

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. 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.

This update also addresses an issue that might prevent the CVE-2020-0689 update from installing. The error message in the CBS.log file is TRUST_E_NOSIGNATURE. To learn more about this security vulnerability, see CVE-2020-0689 | Microsoft Secure Boot Security Feature Bypass Vulnerability.

How to get this update

Method 1: Windows Update 

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

Method 2: Microsoft Update Catalog 

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Method 3: Windows Server Update Services

This update is also available through Windows Server Update Services (WSUS).

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 KB4566426.

File Information

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

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

File name

File version

Date

Time

File size

CbsApi.dll

6.2.9200.16384

25-Jul-2012

20:18

20,480

mofinstall.dll

6.2.9200.23320

4-Mar-2021

15:01

61,440

esscli.dll

6.2.9200.16384

25-Jul-2012

20:19

283,648

mofd.dll

6.2.9200.23320

4-Mar-2021

15:01

196,608

repdrvfs.dll

6.2.9200.16384

25-Jul-2012

20:19

274,944

fastprox.dll

6.2.9200.22865

17-Aug-2019

9:15

629,248

wbemcomn.dll

6.2.9200.21193

8-Aug-2014

23:36

380,928

wbemcore.dll

6.2.9200.23320

4-Mar-2021

15:01

924,672

wmiutils.dll

6.2.9200.16384

25-Jul-2012

20:19

88,576

wbemprox.dll

6.2.9200.16384

25-Jul-2012

20:19

28,160

wmicmiplugin.dll

6.2.9200.23320

4-Mar-2021

15:01

396,288

sppinst.dll

6.2.9200.21193

8-Aug-2014

23:36

518,656

cmifw.dll

6.2.9200.23320

4-Mar-2021

15:01

73,728

FirewallOfflineAPI.dll

6.2.9200.16384

25-Jul-2012

20:18

181,760

securebootai.dll

6.2.9200.23320

4-Mar-2021

15:01

39,936

winsockai.dll

6.2.9200.23320

4-Mar-2021

15:01

64,512

ws2_helper.dll

6.2.9200.16384

25-Jul-2012

20:20

48,128

httpai.dll

6.2.9200.23320

4-Mar-2021

15:01

53,760

peerdistai.dll

6.2.9200.23320

4-Mar-2021

15:01

66,048

PrintAdvancedInstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

72,704

msdtcadvancedinstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

200,704

cleanupai.dll

6.2.9200.23320

4-Mar-2021

15:01

36,352

wdscore.dll

6.2.9200.22865

17-Aug-2019

9:15

225,792

CntrtextInstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

139,776

drvstore.dll

6.2.9200.23060

14-May-2020

21:38

549,376

dpx.dll

6.2.9200.22865

17-Aug-2019

9:15

250,368

msdelta.dll

6.2.9200.23320

4-Mar-2021

15:01

310,784

mspatcha.dll

6.2.9200.16384

25-Jul-2012

20:19

38,912

PkgMgr.exe

6.2.9200.22865

17-Aug-2019

9:15

194,048

cmiv2.dll

6.2.9200.23320

4-Mar-2021

15:01

2,165,248

cmitrust.dll

6.2.9200.23320

4-Mar-2021

15:01

289,792

WcmTypes.xsd

Not versioned

2-Jun-2012

7:54

1,047

CbsMsg.dll

6.2.9200.16384

25-Jul-2012

20:18

41,472

CbsCore.dll

6.2.9200.23320

4-Mar-2021

15:01

1,008,128

TiWorker.exe

6.2.9200.21193

8-Aug-2014

23:37

186,880

TiFileFetcher.exe

6.2.9200.23060

14-May-2020

21:38

380,928

DrUpdate.dll

6.2.9200.23060

14-May-2020

21:38

193,024

wrpint.dll

6.2.9200.21193

8-Aug-2014

23:36

48,640

wcp.dll

6.2.9200.23320

4-Mar-2021

15:01

2,187,776

cmiadapter.dll

6.2.9200.23320

4-Mar-2021

15:01

104,448

smiengine.dll

6.2.9200.23320

4-Mar-2021

15:01

700,928

smipi.dll

6.2.9200.22865

17-Aug-2019

9:15

102,400

poqexec.exe

6.2.9200.22903

11-Oct-2019

8:17

132,608

x86_installed

Not versioned

2-Jun-2012

7:32

9

cmipnpinstall.dll

6.2.9200.23320

4-Mar-2021

15:01

191,488

bfsvc.dll

6.2.9200.23320

4-Mar-2021

15:01

91,136

netfxconfig.dll

6.2.9200.23320

4-Mar-2021

15:01

40,448

timezoneai.dll

6.2.9200.23320

4-Mar-2021

15:01

67,584

ConfigureIEOptionalComponentsAI.dll

6.2.9200.23320

4-Mar-2021

15:01

69,632

IEFileInstallAI.dll

6.2.9200.23320

4-Mar-2021

15:01

59,904

GlobalInstallOrder.xml

Not versioned

2-Jun-2012

13:26

2,240,509

servicemodelregai.dll

6.2.9200.23320

4-Mar-2021

15:01

96,768

SetIEInstalledDateAI.dll

6.2.9200.23320

4-Mar-2021

15:01

41,984

ceipfwdai.dll

6.2.9200.23320

4-Mar-2021

15:01

180,736

luainstall.dll

6.2.9200.23320

4-Mar-2021

15:01

39,424

bcdeditai.dll

6.2.9200.23320

4-Mar-2021

15:01

285,184

appxreg.dll

6.2.9200.23320

4-Mar-2021

15:01

22,016

fveupdateai.dll

6.2.9200.23320

4-Mar-2021

15:01

56,320

RegisterIEPKeysAI.dll

6.2.9200.23320

4-Mar-2021

15:01

24,576

TrustedInstaller.exe

6.2.9200.21193

8-Aug-2014

23:37

85,504

File name

File version

Date

Time

File size

CbsApi.dll

6.2.9200.16384

25-Jul-2012

20:05

23,040

mofinstall.dll

6.2.9200.23320

4-Mar-2021

15:57

71,168

esscli.dll

6.2.9200.22865

17-Aug-2019

10:10

385,024

mofd.dll

6.2.9200.23320

4-Mar-2021

15:57

259,584

repdrvfs.dll

6.2.9200.16384

25-Jul-2012

20:07

366,080

fastprox.dll

6.2.9200.22865

17-Aug-2019

10:10

816,640

wbemcomn.dll

6.2.9200.23320

4-Mar-2021

15:57

462,336

wbemcore.dll

6.2.9200.23320

4-Mar-2021

15:57

1,207,296

wmiutils.dll

6.2.9200.16384

25-Jul-2012

20:07

115,712

wbemprox.dll

6.2.9200.16384

25-Jul-2012

20:07

35,840

wmicmiplugin.dll

6.2.9200.23320

4-Mar-2021

15:57

556,544

sppinst.dll

6.2.9200.21193

8-Aug-2014

23:56

641,024

cmifw.dll

6.2.9200.23320

4-Mar-2021

15:57

89,088

FirewallOfflineAPI.dll

6.2.9200.16384

25-Jul-2012

20:05

211,968

appserverai.dll

6.2.9200.23320

4-Mar-2021

15:57

135,680

RDWebAI.dll

6.2.9200.23320

4-Mar-2021

15:57

126,976

tssdisai.dll

6.2.9200.23320

4-Mar-2021

15:57

144,896

VmHostAI.dll

6.2.9200.23320

4-Mar-2021

15:57

122,880

securebootai.dll

6.2.9200.23320

4-Mar-2021

15:57

36,352

winsockai.dll

6.2.9200.23320

4-Mar-2021

15:57

60,928

ws2_helper.dll

6.2.9200.16384

25-Jul-2012

20:08

59,904

httpai.dll

6.2.9200.23320

4-Mar-2021

15:57

51,712

peerdistai.dll

6.2.9200.23320

4-Mar-2021

15:57

67,584

PrintAdvancedInstaller.dll

6.2.9200.23320

4-Mar-2021

15:57

71,168

msdtcadvancedinstaller.dll

6.2.9200.23320

4-Mar-2021

15:57

239,616

cleanupai.dll

6.2.9200.23320

4-Mar-2021

15:57

31,744

wdscore.dll

6.2.9200.22865

17-Aug-2019

10:10

272,384

CntrtextInstaller.dll

6.2.9200.23320

4-Mar-2021

15:57

165,376

drvstore.dll

6.2.9200.22865

17-Aug-2019

10:10

703,488

dpx.dll

6.2.9200.23060

14-May-2020

22:34

362,496

msdelta.dll

6.2.9200.23320

4-Mar-2021

15:57

414,208

mspatcha.dll

6.2.9200.16384

25-Jul-2012

20:07

45,056

PkgMgr.exe

6.2.9200.22865

17-Aug-2019

10:10

196,096

cmiv2.dll

6.2.9200.23320

4-Mar-2021

15:57

3,305,984

cmitrust.dll

6.2.9200.23320

4-Mar-2021

15:57

407,552

WcmTypes.xsd

Not versioned

2-Jun-2012

7:54

1,047

CbsMsg.dll

6.2.9200.16384

25-Jul-2012

20:05

41,472

CbsCore.dll

6.2.9200.23320

4-Mar-2021

15:57

1,163,776

TiWorker.exe

6.2.9200.21193

8-Aug-2014

23:57

189,440

TiFileFetcher.exe

6.2.9200.23060

14-May-2020

22:35

460,800

DrUpdate.dll

6.2.9200.22865

17-Aug-2019

10:10

244,224

wrpint.dll

6.2.9200.16384

25-Jul-2012

20:08

60,928

wcp.dll

6.2.9200.23320

4-Mar-2021

15:57

2,835,456

cmiadapter.dll

6.2.9200.23320

4-Mar-2021

15:57

116,224

smiengine.dll

6.2.9200.23320

4-Mar-2021

15:57

895,488

smipi.dll

6.2.9200.23320

4-Mar-2021

15:57

110,592

poqexec.exe

6.2.9200.23060

14-May-2020

22:35

148,480

amd64_installed

Not versioned

2-Jun-2012

7:32

9

cmipnpinstall.dll

6.2.9200.23320

4-Mar-2021

15:57

250,880

bfsvc.dll

6.2.9200.23320

4-Mar-2021

15:57

91,648

netfxconfig.dll

6.2.9200.23320

4-Mar-2021

15:57

34,304

timezoneai.dll

6.2.9200.23320

4-Mar-2021

15:57

75,264

ConfigureIEOptionalComponentsAI.dll

6.2.9200.23320

4-Mar-2021

15:57

73,216

IEFileInstallAI.dll

6.2.9200.23320

4-Mar-2021

15:57

58,880

GlobalInstallOrder.xml

Not versioned

2-Jun-2012

13:26

2,240,509

servicemodelregai.dll

6.2.9200.23320

4-Mar-2021

15:57

116,224

SetIEInstalledDateAI.dll

6.2.9200.23320

4-Mar-2021

15:57

42,496

ceipfwdai.dll

6.2.9200.23320

4-Mar-2021

15:57

212,480

luainstall.dll

6.2.9200.23320

4-Mar-2021

15:57

50,176

bcdeditai.dll

6.2.9200.23320

4-Mar-2021

15:57

300,032

appxreg.dll

6.2.9200.23320

4-Mar-2021

15:57

15,360

fveupdateai.dll

6.2.9200.23320

4-Mar-2021

15:57

56,832

RegisterIEPKeysAI.dll

6.2.9200.23320

4-Mar-2021

15:57

19,456

TrustedInstaller.exe

6.2.9200.21193

8-Aug-2014

23:57

98,304

mofinstall.dll

6.2.9200.23320

4-Mar-2021

15:01

61,440

esscli.dll

6.2.9200.16384

25-Jul-2012

20:19

283,648

mofd.dll

6.2.9200.23320

4-Mar-2021

15:01

196,608

repdrvfs.dll

6.2.9200.16384

25-Jul-2012

20:19

274,944

fastprox.dll

6.2.9200.22865

17-Aug-2019

9:15

629,248

wbemcomn.dll

6.2.9200.21193

8-Aug-2014

23:36

380,928

wbemcore.dll

6.2.9200.23320

4-Mar-2021

15:01

924,672

wmiutils.dll

6.2.9200.16384

25-Jul-2012

20:19

88,576

wbemprox.dll

6.2.9200.16384

25-Jul-2012

20:19

28,160

wmicmiplugin.dll

6.2.9200.23320

4-Mar-2021

15:01

396,288

sppinst.dll

6.2.9200.21193

8-Aug-2014

23:36

518,656

cmifw.dll

6.2.9200.23320

4-Mar-2021

15:01

73,728

FirewallOfflineAPI.dll

6.2.9200.16384

25-Jul-2012

20:18

181,760

securebootai.dll

6.2.9200.23320

4-Mar-2021

15:01

39,936

winsockai.dll

6.2.9200.23320

4-Mar-2021

15:01

64,512

ws2_helper.dll

6.2.9200.16384

25-Jul-2012

20:20

48,128

httpai.dll

6.2.9200.23320

4-Mar-2021

15:01

53,760

peerdistai.dll

6.2.9200.23320

4-Mar-2021

15:01

66,048

PrintAdvancedInstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

72,704

msdtcadvancedinstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

200,704

cleanupai.dll

6.2.9200.23320

4-Mar-2021

15:01

36,352

wdscore.dll

6.2.9200.22865

17-Aug-2019

9:15

225,792

CntrtextInstaller.dll

6.2.9200.23320

4-Mar-2021

15:01

139,776

drvstore.dll

6.2.9200.23060

14-May-2020

21:38

549,376

dpx.dll

6.2.9200.22865

17-Aug-2019

9:15

250,368

msdelta.dll

6.2.9200.23320

4-Mar-2021

15:01

310,784

mspatcha.dll

6.2.9200.16384

25-Jul-2012

20:19

38,912

PkgMgr.exe

6.2.9200.22865

17-Aug-2019

9:15

194,048

cmiv2.dll

6.2.9200.23320

4-Mar-2021

15:01

2,165,248

cmitrust.dll

6.2.9200.23320

4-Mar-2021

15:01

289,792

WcmTypes.xsd

Not versioned

2-Jun-2012

7:54

1,047

CbsMsg.dll

6.2.9200.16384

25-Jul-2012

20:18

41,472

CbsCore.dll

6.2.9200.23320

4-Mar-2021

15:01

1,008,128

TiWorker.exe

6.2.9200.21193

8-Aug-2014

23:37

186,880

TiFileFetcher.exe

6.2.9200.23060

14-May-2020

21:38

380,928

DrUpdate.dll

6.2.9200.23060

14-May-2020

21:38

193,024

wrpint.dll

6.2.9200.21193

8-Aug-2014

23:36

48,640

wcp.dll

6.2.9200.23320

4-Mar-2021

15:01

2,187,776

cmiadapter.dll

6.2.9200.23320

4-Mar-2021

15:01

104,448

smiengine.dll

6.2.9200.23320

4-Mar-2021

15:01

700,928

smipi.dll

6.2.9200.22865

17-Aug-2019

9:15

102,400

poqexec.exe

6.2.9200.22903

11-Oct-2019

8:17

132,608

x86_installed

Not versioned

2-Jun-2012

7:32

9

cmipnpinstall.dll

6.2.9200.23320

4-Mar-2021

15:01

191,488

bfsvc.dll

6.2.9200.23320

4-Mar-2021

15:01

91,136

netfxconfig.dll

6.2.9200.23320

4-Mar-2021

15:01

40,448

timezoneai.dll

6.2.9200.23320

4-Mar-2021

15:01

67,584

ConfigureIEOptionalComponentsAI.dll

6.2.9200.23320

4-Mar-2021

15:01

69,632

IEFileInstallAI.dll

6.2.9200.23320

4-Mar-2021

15:01

59,904

GlobalInstallOrder.xml

Not versioned

2-Jun-2012

13:26

2,240,509

servicemodelregai.dll

6.2.9200.23320

4-Mar-2021

15:01

96,768

SetIEInstalledDateAI.dll

6.2.9200.23320

4-Mar-2021

15:01

41,984

ceipfwdai.dll

6.2.9200.23320

4-Mar-2021

15:01

180,736

luainstall.dll

6.2.9200.23320

4-Mar-2021

15:01

39,424

bcdeditai.dll

6.2.9200.23320

4-Mar-2021

15:01

285,184

appxreg.dll

6.2.9200.23320

4-Mar-2021

15:01

22,016

fveupdateai.dll

6.2.9200.23320

4-Mar-2021

15:01

56,320

RegisterIEPKeysAI.dll

6.2.9200.23320

4-Mar-2021

15:01

24,576

References

For information on SSUs, see the following articles:

Learn about the terminology that Microsoft uses to describe software updates.

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