Summary

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

  • Addressed an issue in which adding vulnerable boot level components to the Secure Boot disallow list (dbx) may cause the system not to start.

We strongly recommend you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). Installing servicing stack updates (SSU) make sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft security fixes.

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 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.  

Update replacement information 

This update replaces the previously released update KB 3173426.

File Information

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.Windows Server 2012 file information

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

File verification

File hash information

File name

SHA1 hash

SHA256 hash

Windows8-RT-KB4512939-x64.msu

B7FFC269FE92A4262D4B808BE7A4AAB728F192F6

2DF2C177B643EF34C512BD030300EFB598DA51CACBE15883D4AE64BF612CE4E6

For all supported x64-based versions

File name

File version

File size

Date

Time

Cbsapi.dll

6.2.9200.16384

23,040

26-Jul-2012

03:05

Esscli.dll

6.2.9200.22865

385,024

17-Aug-2019

17:10

Fastprox.dll

6.2.9200.22865

816,640

17-Aug-2019

17:10

Mofd.dll

6.2.9200.22865

258,048

17-Aug-2019

17:10

Mofinstall.dll

6.2.9200.16384

71,168

26-Jul-2012

03:07

Repdrvfs.dll

6.2.9200.16384

366,080

26-Jul-2012

03:07

Wbemcomn.dll

6.2.9200.22865

462,336

17-Aug-2019

17:10

Wbemcore.dll

6.2.9200.22865

1,207,296

17-Aug-2019

17:10

Wbemprox.dll

6.2.9200.16384

35,840

26-Jul-2012

03:07

Wmicmiplugin.dll

6.2.9200.22865

556,032

17-Aug-2019

17:10

Wmiutils.dll

6.2.9200.16384

115,712

26-Jul-2012

03:07

Sppinst.dll

6.2.9200.21193

641,024

09-Aug-2014

06:56

Cmifw.dll

6.2.9200.16384

88,576

26-Jul-2012

03:05

Firewallofflineapi.dll

6.2.9200.16384

211,968

26-Jul-2012

03:05

Appserverai.dll

6.2.9200.16384

135,680

26-Jul-2012

03:05

Rdwebai.dll

6.2.9200.21913

126,976

23-Jun-2016

01:26

Tssdisai.dll

6.2.9200.22865

144,896

17-Aug-2019

17:10

Vmhostai.dll

6.2.9200.16384

122,880

26-Jul-2012

03:07

Appxreg.dll

6.2.9200.16384

15,360

26-Jul-2012

03:05

Bcdeditai.dll

6.2.9200.21193

300,032

09-Aug-2014

06:55

Bfsvc.dll

6.2.9200.16384

91,648

26-Jul-2012

03:05

Cbscore.dll

6.2.9200.22865

1,162,752

17-Aug-2019

17:10

Cbsmsg.dll

6.2.9200.16384

41,472

26-Jul-2012

03:05

Ceipfwdai.dll

6.2.9200.22865

212,480

17-Aug-2019

17:10

Cleanupai.dll

6.2.9200.16384

31,232

26-Jul-2012

03:05

Cmiadapter.dll

6.2.9200.16384

116,224

26-Jul-2012

03:05

Cmipnpinstall.dll

6.2.9200.22865

249,344

17-Aug-2019

17:10

Cmitrust.dll

6.2.9200.22865

407,040

17-Aug-2019

17:10

Cmiv2.dll

6.2.9200.22865

3,293,184

17-Aug-2019

17:10

Cntrtextinstaller.dll

6.2.9200.16384

164,864

26-Jul-2012

03:05

Configureieoptionalcomponentsai.dll

6.2.9200.16384

73,216

26-Jul-2012

03:05

Dpx.dll

6.2.9200.22865

361,984

17-Aug-2019

17:10

Drupdate.dll

6.2.9200.22865

244,224

17-Aug-2019

17:10

Drvstore.dll

6.2.9200.22865

703,488

17-Aug-2019

17:10

Fveupdateai.dll

6.2.9200.16384

56,832

26-Jul-2012

03:05

Globalinstallorder.xml

Not applicable

2,240,509

02-Jun-2012

20:26

Httpai.dll

6.2.9200.22865

51,712

17-Aug-2019

17:10

Iefileinstallai.dll

6.2.9200.16384

58,880

26-Jul-2012

03:05

Luainstall.dll

6.2.9200.16384

50,176

26-Jul-2012

03:06

Msdelta.dll

6.2.9200.22865

414,208

17-Aug-2019

17:10

Msdtcadvancedinstaller.dll

6.2.9200.22865

239,616

17-Aug-2019

17:10

Mspatcha.dll

6.2.9200.16384

45,056

26-Jul-2012

03:07

Netfxconfig.dll

6.2.9200.16384

34,304

26-Jul-2012

03:06

Peerdistai.dll

6.2.9200.16384

67,584

26-Jul-2012

03:06

Pkgmgr.exe

6.2.9200.22865

196,096

17-Aug-2019

17:10

Poqexec.exe

6.2.9200.22865

148,480

17-Aug-2019

17:10

Printadvancedinstaller.dll

6.2.9200.22865

71,168

17-Aug-2019

17:10

Registeriepkeysai.dll

6.2.9200.16384

19,456

26-Jul-2012

03:07

Securebootai.dll

6.2.9200.22865

36,352

17-Aug-2019

17:10

Servicemodelregai.dll

6.2.9200.22865

116,224

17-Aug-2019

17:10

Setieinstalleddateai.dll

6.2.9200.16384

42,496

26-Jul-2012

03:07

Smiengine.dll

6.2.9200.22865

894,464

17-Aug-2019

17:10

Smipi.dll

6.2.9200.22865

110,592

17-Aug-2019

17:10

Tifilefetcher.exe

6.2.9200.22865

460,800

17-Aug-2019

17:10

Timezoneai.dll

6.2.9200.16384

75,264

26-Jul-2012

03:07

Tiworker.exe

6.2.9200.21193

189,440

09-Aug-2014

06:57

Wcmtypes.xsd

Not applicable

1,047

02-Jun-2012

14:54

Wcp.dll

6.2.9200.22865

2,835,456

17-Aug-2019

17:10

Wdscore.dll

6.2.9200.22865

272,384

17-Aug-2019

17:10

Winsockai.dll

6.2.9200.16384

60,928

26-Jul-2012

03:07

Wrpint.dll

6.2.9200.16384

60,928

26-Jul-2012

03:08

Ws2_helper.dll

6.2.9200.16384

59,904

26-Jul-2012

03:08

Trustedinstaller.exe

6.2.9200.21193

98,304

09-Aug-2014

06:57

Esscli.dll

6.2.9200.16384

283,648

26-Jul-2012

03:19

Fastprox.dll

6.2.9200.22865

629,248

17-Aug-2019

16:15

Mofd.dll

6.2.9200.16384

195,072

26-Jul-2012

03:19

Mofinstall.dll

6.2.9200.16384

61,440

26-Jul-2012

03:19

Repdrvfs.dll

6.2.9200.16384

274,944

26-Jul-2012

03:19

Wbemcomn.dll

6.2.9200.21193

380,928

09-Aug-2014

06:36

Wbemcore.dll

6.2.9200.22865

924,160

17-Aug-2019

16:15

Wbemprox.dll

6.2.9200.16384

28,160

26-Jul-2012

03:19

Wmicmiplugin.dll

6.2.9200.22865

395,776

17-Aug-2019

16:15

Wmiutils.dll

6.2.9200.16384

88,576

26-Jul-2012

03:19

Sppinst.dll

6.2.9200.21193

518,656

09-Aug-2014

06:36

Cmifw.dll

6.2.9200.16384

73,728

26-Jul-2012

03:18

Firewallofflineapi.dll

6.2.9200.16384

181,760

26-Jul-2012

03:18

Appxreg.dll

6.2.9200.16384

22,016

26-Jul-2012

03:17

Bcdeditai.dll

6.2.9200.21193

285,184

09-Aug-2014

06:35

Bfsvc.dll

6.2.9200.16384

91,136

26-Jul-2012

03:18

Cbscore.dll

6.2.9200.22865

1,007,104

17-Aug-2019

16:15

Cbsmsg.dll

6.2.9200.16384

41,472

26-Jul-2012

03:18

Ceipfwdai.dll

6.2.9200.22865

180,736

17-Aug-2019

16:15

Cleanupai.dll

6.2.9200.16384

36,352

26-Jul-2012

03:18

Cmiadapter.dll

6.2.9200.22865

103,936

17-Aug-2019

16:15

Cmipnpinstall.dll

6.2.9200.22865

190,464

17-Aug-2019

16:15

Cmitrust.dll

6.2.9200.21913

289,280

23-Jun-2016

01:48

Cmiv2.dll

6.2.9200.22865

2,156,032

17-Aug-2019

16:15

Cntrtextinstaller.dll

6.2.9200.22865

139,776

17-Aug-2019

16:15

Configureieoptionalcomponentsai.dll

6.2.9200.22865

69,632

17-Aug-2019

16:15

Dpx.dll

6.2.9200.22865

250,368

17-Aug-2019

16:15

Drupdate.dll

6.2.9200.22865

193,024

17-Aug-2019

16:15

Drvstore.dll

6.2.9200.22865

549,376

17-Aug-2019

16:15

Fveupdateai.dll

6.2.9200.22865

56,320

17-Aug-2019

16:15

Globalinstallorder.xml

Not applicable

2,240,509

02-Jun-2012

20:26

Httpai.dll

6.2.9200.22865

53,760

17-Aug-2019

16:15

Iefileinstallai.dll

6.2.9200.22865

59,904

17-Aug-2019

16:15

Luainstall.dll

6.2.9200.16384

39,424

26-Jul-2012

03:18

Msdelta.dll

6.2.9200.22865

310,784

17-Aug-2019

16:15

Msdtcadvancedinstaller.dll

6.2.9200.22865

200,704

17-Aug-2019

16:15

Mspatcha.dll

6.2.9200.16384

38,912

26-Jul-2012

03:19

Netfxconfig.dll

6.2.9200.16384

40,448

26-Jul-2012

03:19

Peerdistai.dll

6.2.9200.22865

66,048

17-Aug-2019

16:15

Pkgmgr.exe

6.2.9200.22865

194,048

17-Aug-2019

16:15

Poqexec.exe

6.2.9200.22865

132,608

17-Aug-2019

16:15

Printadvancedinstaller.dll

6.2.9200.22865

72,704

17-Aug-2019

16:15

Registeriepkeysai.dll

6.2.9200.16384

24,576

26-Jul-2012

03:19

Securebootai.dll

6.2.9200.22865

39,936

17-Aug-2019

16:15

Servicemodelregai.dll

6.2.9200.22865

96,768

17-Aug-2019

16:15

Setieinstalleddateai.dll

6.2.9200.22865

41,984

17-Aug-2019

16:15

Smiengine.dll

6.2.9200.22865

700,928

17-Aug-2019

16:15

Smipi.dll

6.2.9200.22865

102,400

17-Aug-2019

16:15

Tifilefetcher.exe

6.2.9200.22865

380,928

17-Aug-2019

16:15

Timezoneai.dll

6.2.9200.21193

67,584

09-Aug-2014

06:36

Tiworker.exe

6.2.9200.21193

186,880

09-Aug-2014

06:37

Wcmtypes.xsd

Not applicable

1,047

02-Jun-2012

14:54

Wcp.dll

6.2.9200.22865

2,187,776

17-Aug-2019

16:15

Wdscore.dll

6.2.9200.22865

225,792

17-Aug-2019

16:15

Winsockai.dll

6.2.9200.16384

64,512

26-Jul-2012

03:20

Wrpint.dll

6.2.9200.21193

48,640

09-Aug-2014

06:36

Ws2_helper.dll

6.2.9200.16384

48,128

26-Jul-2012

03:20

References

For more information about SSUs, see Servicing stack updates.

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

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