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.

Important Before you install this update, see the Prerequisites section.

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

To install Windows 7 SP1 and Windows Server 2008 R2 SP1 updates released on or after July 2019, you must have the following required updates installed. If you use Windows Update, these required updates will be offered automatically as needed

Important You must restart your device after you install these required updates.

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 KB4537829.

File Information


File attributes

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 verification

File hash information

File name

SHA1 hash

SHA256 hash

Windows6.1-KB4550735-x86.msu

5811DEF508A4D12403ECD1CB4BBB5C9922C792EA

6810D28B6D22C3798D1AC9FD11157A16BE0EA077C63D0853BC568B7FB301A50C

Windows6.1-KB4550735-x64.msu

18117664B4A0482C3D34A2F05F70C6819296240F

E6C9B068EE05F667073E51BCE8B91BF8585AAF186316690C069AB64F59F3FD28

Windows6.1-KB4550735-ia64.msu

1336150981B971730612C415C8D16995B6DAA24A

E55569F29A9458C9CD4640CBC7DAB88C7BC30F12453F58CC6FCFE509EAB061A2

For all supported x86-based versions

File name

File version

File size

Date

Time

Apds.dll

6.1.7601.24550

1,798,144

05-Mar-2020

00:44

Apircl.dll

6.1.7601.24550

223,744

05-Mar-2020

00:44

Apss.dll

6.1.7601.24550

201,216

05-Mar-2020

00:44

Cbscore.dll

6.1.7601.24550

845,824

05-Mar-2020

00:42

Cbsmsg.dll

6.1.7601.24550

28,672

05-Mar-2020

00:10

Cmiadapter.dll

6.1.7601.24550

120,320

05-Mar-2020

00:42

Cmitrust.dll

6.1.7601.24550

296,960

05-Mar-2020

00:42

Cmiv2.dll

6.1.7601.24550

2,040,832

05-Mar-2020

00:42

Cntrtextinstaller.dll

6.1.7601.24550

143,872

05-Mar-2020

00:42

Dpx.dll

6.1.7601.24550

257,024

05-Mar-2020

00:42

Drupdate.dll

6.1.7601.24550

174,080

05-Mar-2020

00:42

Drvstore.dll

6.1.7601.24550

324,096

05-Mar-2020

00:42

Esscli.dll

6.1.7601.24550

266,240

05-Mar-2020

00:42

Extendedsecurityupdatesai.dll

6.1.7601.24550

89,088

05-Mar-2020

00:10

Fastprox.dll

6.1.7601.24550

606,720

05-Mar-2020

00:42

Globalinstallorder.xml

Not applicable

1,973,556

26-Nov-2019

20:21

Helpcins.dll

6.1.7601.24550

105,472

05-Mar-2020

00:42

Locdrv.dll

6.1.7601.24550

229,888

05-Mar-2020

00:44

Mofd.dll

6.1.7601.24550

192,000

05-Mar-2020

00:43

Mofinstall.dll

6.1.7601.24550

58,880

05-Mar-2020

00:43

Msdelta.dll

6.1.7601.24550

305,664

05-Mar-2020

00:43

Mspatcha.dll

6.1.7601.24550

35,328

05-Mar-2020

00:43

Oemhelpins.dll

6.1.7601.24550

151,040

05-Mar-2020

00:43

Pkgmgr.exe

6.1.7601.24550

209,920

05-Mar-2020

00:10

Poqexec.exe

6.1.7601.24550

123,904

05-Mar-2020

00:10

Repdrvfs.dll

6.1.7601.24550

302,080

05-Mar-2020

00:43

Smiengine.dll

6.1.7601.24550

697,344

05-Mar-2020

00:44

Smipi.dll

6.1.7601.24550

98,816

05-Mar-2020

00:44

Svcini.exe

6.1.7601.24550

16,384

05-Mar-2020

00:10

Wbemcomn.dll

6.1.7601.24550

363,520

05-Mar-2020

00:44

Wbemcore.dll

6.1.7601.24550

780,288

05-Mar-2020

00:44

Wbemprox.dll

6.1.7601.24550

29,184

05-Mar-2020

00:44

Wcmtypes.xsd

Not applicable

1,047

26-Nov-2019

21:19

Wcp.dll

6.1.7601.24550

1,913,344

05-Mar-2020

00:44

Wdscore.dll

6.1.7601.24550

190,464

05-Mar-2020

00:44

Wmicmiplugin.dll

6.1.7601.24550

351,744

05-Mar-2020

00:44

Wmiutils.dll

6.1.7601.24550

85,504

05-Mar-2020

00:44

Wrpint.dll

6.1.7601.24550

54,272

05-Mar-2020

00:08

Xmllite.dll

1.3.1001.0

180,736

05-Mar-2020

00:44

For all supported x64-based versions

File name

File version

File size

Date

Time

Apds.dll

6.1.7601.24550

2,172,928

05-Mar-2020

00:37

Apircl.dll

6.1.7601.24550

276,480

05-Mar-2020

00:37

Apss.dll

6.1.7601.24550

235,520

05-Mar-2020

00:37

Cbscore.dll

6.1.7601.24550

976,896

05-Mar-2020

00:36

Cbsmsg.dll

6.1.7601.24550

28,672

05-Mar-2020

00:36

Cmiadapter.dll

6.1.7601.24550

125,952

05-Mar-2020

00:36

Cmitrust.dll

6.1.7601.24550

479,232

05-Mar-2020

00:36

Cmiv2.dll

6.1.7601.24550

3,739,136

05-Mar-2020

00:36

Cntrtextinstaller.dll

6.1.7601.24550

170,496

05-Mar-2020

00:37

Dpx.dll

6.1.7601.24550

399,872

05-Mar-2020

00:37

Drupdate.dll

6.1.7601.24550

204,288

05-Mar-2020

00:37

Drvstore.dll

6.1.7601.24550

423,936

05-Mar-2020

00:37

Esscli.dll

6.1.7601.24550

440,320

05-Mar-2020

00:37

Extendedsecurityupdatesai.dll

6.1.7601.24550

102,400

05-Mar-2020

00:02

Fastprox.dll

6.1.7601.24550

909,824

05-Mar-2020

00:37

Globalinstallorder.xml

Not applicable

1,973,556

18-Nov-2018

02:41

Helpcins.dll

6.1.7601.24550

142,336

05-Mar-2020

00:37

Locdrv.dll

6.1.7601.24550

370,176

05-Mar-2020

00:37

Mofd.dll

6.1.7601.24550

278,528

05-Mar-2020

00:37

Mofinstall.dll

6.1.7601.24550

76,288

05-Mar-2020

00:37

Msdelta.dll

6.1.7601.24550

452,096

05-Mar-2020

00:37

Mspatcha.dll

6.1.7601.24550

46,592

05-Mar-2020

00:37

Oemhelpins.dll

6.1.7601.24550

222,208

05-Mar-2020

00:37

Pkgmgr.exe

6.1.7601.24550

199,168

05-Mar-2020

00:02

Poqexec.exe

6.1.7601.24550

142,336

05-Mar-2020

00:02

Repdrvfs.dll

6.1.7601.24550

454,144

05-Mar-2020

00:37

Smiengine.dll

6.1.7601.24550

933,376

05-Mar-2020

00:37

Smipi.dll

6.1.7601.24550

104,448

05-Mar-2020

00:37

Svcini.exe

6.1.7601.24550

17,920

05-Mar-2020

00:02

Wbemcomn.dll

6.1.7601.24550

529,920

05-Mar-2020

00:38

Wbemcore.dll

6.1.7601.24550

1,225,216

05-Mar-2020

00:38

Wbemprox.dll

6.1.7601.24550

43,520

05-Mar-2020

00:38

Wcmtypes.xsd

Not applicable

1,047

18-Nov-2018

02:57

Wcp.dll

6.1.7601.24550

2,762,752

05-Mar-2020

00:38

Wdscore.dll

6.1.7601.24550

271,872

05-Mar-2020

00:38

Wmicmiplugin.dll

6.1.7601.24550

525,824

05-Mar-2020

00:38

Wmiutils.dll

6.1.7601.24550

137,216

05-Mar-2020

00:38

Wrpint.dll

6.1.7601.24550

60,928

05-Mar-2020

00:38

Xmllite.dll

1.3.1001.0

198,656

05-Mar-2020

00:38

Apds.dll

6.1.7601.24550

1,798,144

05-Mar-2020

00:44

Apircl.dll

6.1.7601.24550

223,744

05-Mar-2020

00:44

Apss.dll

6.1.7601.24550

201,216

05-Mar-2020

00:44

Cbscore.dll

6.1.7601.24550

845,824

05-Mar-2020

00:42

Cbsmsg.dll

6.1.7601.24550

28,672

05-Mar-2020

00:10

Cmiadapter.dll

6.1.7601.24550

120,320

05-Mar-2020

00:42

Cmitrust.dll

6.1.7601.24550

296,960

05-Mar-2020

00:42

Cmiv2.dll

6.1.7601.24550

2,040,832

05-Mar-2020

00:42

Cntrtextinstaller.dll

6.1.7601.24550

143,872

05-Mar-2020

00:42

Dpx.dll

6.1.7601.24550

257,024

05-Mar-2020

00:42

Drupdate.dll

6.1.7601.24550

174,080

05-Mar-2020

00:42

Drvstore.dll

6.1.7601.24550

324,096

05-Mar-2020

00:42

Esscli.dll

6.1.7601.24550

266,240

05-Mar-2020

00:42

Extendedsecurityupdatesai.dll

6.1.7601.24550

89,088

05-Mar-2020

00:10

Fastprox.dll

6.1.7601.24550

606,720

05-Mar-2020

00:42

Globalinstallorder.xml

Not applicable

1,973,556

26-Nov-2019

20:21

Helpcins.dll

6.1.7601.24550

105,472

05-Mar-2020

00:42

Locdrv.dll

6.1.7601.24550

229,888

05-Mar-2020

00:44

Mofd.dll

6.1.7601.24550

192,000

05-Mar-2020

00:43

Mofinstall.dll

6.1.7601.24550

58,880

05-Mar-2020

00:43

Msdelta.dll

6.1.7601.24550

305,664

05-Mar-2020

00:43

Mspatcha.dll

6.1.7601.24550

35,328

05-Mar-2020

00:43

Oemhelpins.dll

6.1.7601.24550

151,040

05-Mar-2020

00:43

Pkgmgr.exe

6.1.7601.24550

209,920

05-Mar-2020

00:10

Poqexec.exe

6.1.7601.24550

123,904

05-Mar-2020

00:10

Repdrvfs.dll

6.1.7601.24550

302,080

05-Mar-2020

00:43

Smiengine.dll

6.1.7601.24550

697,344

05-Mar-2020

00:44

Smipi.dll

6.1.7601.24550

98,816

05-Mar-2020

00:44

Svcini.exe

6.1.7601.24550

16,384

05-Mar-2020

00:10

Wbemcomn.dll

6.1.7601.24550

363,520

05-Mar-2020

00:44

Wbemcore.dll

6.1.7601.24550

780,288

05-Mar-2020

00:44

Wbemprox.dll

6.1.7601.24550

29,184

05-Mar-2020

00:44

Wcmtypes.xsd

Not applicable

1,047

26-Nov-2019

21:19

Wcp.dll

6.1.7601.24550

1,913,344

05-Mar-2020

00:44

Wdscore.dll

6.1.7601.24550

190,464

05-Mar-2020

00:44

Wmicmiplugin.dll

6.1.7601.24550

351,744

05-Mar-2020

00:44

Wmiutils.dll

6.1.7601.24550

85,504

05-Mar-2020

00:44

Wrpint.dll

6.1.7601.24550

54,272

05-Mar-2020

00:08

Xmllite.dll

1.3.1001.0

180,736

05-Mar-2020

00:44

For all supported ia64-based versions

File name

File version

File size

Date

Time

Apds.dll

6.1.7601.24550

3,342,336

05-Mar-2020

00:22

Apircl.dll

6.1.7601.24550

752,128

05-Mar-2020

00:22

Apss.dll

6.1.7601.24550

560,128

05-Mar-2020

00:22

Cbscore.dll

6.1.7601.24550

1,837,056

05-Mar-2020

00:21

Cbsmsg.dll

6.1.7601.24550

40,448

05-Mar-2020

00:21

Cmiadapter.dll

6.1.7601.24550

284,672

05-Mar-2020

00:21

Cmitrust.dll

6.1.7601.24550

987,136

05-Mar-2020

00:21

Cmiv2.dll

6.1.7601.24550

6,536,192

05-Mar-2020

00:21

Cntrtextinstaller.dll

6.1.7601.24550

357,376

05-Mar-2020

00:21

Dpx.dll

6.1.7601.24550

770,560

05-Mar-2020

00:21

Drupdate.dll

6.1.7601.24550

390,656

05-Mar-2020

00:21

Drvstore.dll

6.1.7601.24550

742,912

05-Mar-2020

00:21

Esscli.dll

6.1.7601.24550

1,011,200

05-Mar-2020

00:21

Extendedsecurityupdatesai.dll

6.1.7601.24550

216,064

04-Mar-2020

23:55

Fastprox.dll

6.1.7601.24550

2,100,224

05-Mar-2020

00:21

Globalinstallorder.xml

Not applicable

1,973,556

18-Nov-2018

02:41

Helpcins.dll

6.1.7601.24550

187,904

05-Mar-2020

00:21

Locdrv.dll

6.1.7601.24550

803,328

05-Mar-2020

00:22

Mofd.dll

6.1.7601.24550

643,584

05-Mar-2020

00:22

Mofinstall.dll

6.1.7601.24550

193,024

05-Mar-2020

00:22

Msdelta.dll

6.1.7601.24550

890,880

05-Mar-2020

00:22

Mspatcha.dll

6.1.7601.24550

111,104

05-Mar-2020

00:22

Oemhelpins.dll

6.1.7601.24550

420,352

05-Mar-2020

00:22

Pkgmgr.exe

6.1.7601.24550

334,848

04-Mar-2020

23:56

Poqexec.exe

6.1.7601.24550

272,384

04-Mar-2020

23:55

Repdrvfs.dll

6.1.7601.24550

1,067,520

05-Mar-2020

00:22

Smiengine.dll

6.1.7601.24550

1,953,792

05-Mar-2020

00:22

Smipi.dll

6.1.7601.24550

186,880

05-Mar-2020

00:22

Svcini.exe

6.1.7601.24550

41,984

04-Mar-2020

23:55

Wbemcomn.dll

6.1.7601.24550

1,005,056

05-Mar-2020

00:22

Wbemcore.dll

6.1.7601.24550

2,959,872

05-Mar-2020

00:22

Wbemprox.dll

6.1.7601.24550

102,912

05-Mar-2020

00:22

Wcmtypes.xsd

Not applicable

1,047

18-Nov-2018

02:59

Wcp.dll

6.1.7601.24550

5,137,408

05-Mar-2020

00:22

Wdscore.dll

6.1.7601.24550

600,576

05-Mar-2020

00:22

Wmicmiplugin.dll

6.1.7601.24550

940,544

05-Mar-2020

00:22

Wmiutils.dll

6.1.7601.24550

273,408

05-Mar-2020

00:22

Wrpint.dll

6.1.7601.24550

128,000

05-Mar-2020

00:22

Xmllite.dll

1.3.1001.0

449,024

05-Mar-2020

00:22

Apds.dll

6.1.7601.24550

1,798,144

05-Mar-2020

00:44

Apircl.dll

6.1.7601.24550

223,744

05-Mar-2020

00:44

Apss.dll

6.1.7601.24550

201,216

05-Mar-2020

00:44

Cbscore.dll

6.1.7601.24550

845,824

05-Mar-2020

00:42

Cbsmsg.dll

6.1.7601.24550

28,672

05-Mar-2020

00:10

Cmiadapter.dll

6.1.7601.24550

120,320

05-Mar-2020

00:42

Cmitrust.dll

6.1.7601.24550

296,960

05-Mar-2020

00:42

Cmiv2.dll

6.1.7601.24550

2,040,832

05-Mar-2020

00:42

Cntrtextinstaller.dll

6.1.7601.24550

143,872

05-Mar-2020

00:42

Dpx.dll

6.1.7601.24550

257,024

05-Mar-2020

00:42

Drupdate.dll

6.1.7601.24550

174,080

05-Mar-2020

00:42

Drvstore.dll

6.1.7601.24550

324,096

05-Mar-2020

00:42

Esscli.dll

6.1.7601.24550

266,240

05-Mar-2020

00:42

Extendedsecurityupdatesai.dll

6.1.7601.24550

89,088

05-Mar-2020

00:10

Fastprox.dll

6.1.7601.24550

606,720

05-Mar-2020

00:42

Globalinstallorder.xml

Not applicable

1,973,556

26-Nov-2019

20:21

Helpcins.dll

6.1.7601.24550

105,472

05-Mar-2020

00:42

Locdrv.dll

6.1.7601.24550

229,888

05-Mar-2020

00:44

Mofd.dll

6.1.7601.24550

192,000

05-Mar-2020

00:43

Mofinstall.dll

6.1.7601.24550

58,880

05-Mar-2020

00:43

Msdelta.dll

6.1.7601.24550

305,664

05-Mar-2020

00:43

Mspatcha.dll

6.1.7601.24550

35,328

05-Mar-2020

00:43

Oemhelpins.dll

6.1.7601.24550

151,040

05-Mar-2020

00:43

Pkgmgr.exe

6.1.7601.24550

209,920

05-Mar-2020

00:10

Poqexec.exe

6.1.7601.24550

123,904

05-Mar-2020

00:10

Repdrvfs.dll

6.1.7601.24550

302,080

05-Mar-2020

00:43

Smiengine.dll

6.1.7601.24550

697,344

05-Mar-2020

00:44

Smipi.dll

6.1.7601.24550

98,816

05-Mar-2020

00:44

Svcini.exe

6.1.7601.24550

16,384

05-Mar-2020

00:10

Wbemcomn.dll

6.1.7601.24550

363,520

05-Mar-2020

00:44

Wbemcore.dll

6.1.7601.24550

780,288

05-Mar-2020

00:44

Wbemprox.dll

6.1.7601.24550

29,184

05-Mar-2020

00:44

Wcmtypes.xsd

Not applicable

1,047

26-Nov-2019

21:19

Wcp.dll

6.1.7601.24550

1,913,344

05-Mar-2020

00:44

Wdscore.dll

6.1.7601.24550

190,464

05-Mar-2020

00:44

Wmicmiplugin.dll

6.1.7601.24550

351,744

05-Mar-2020

00:44

Wmiutils.dll

6.1.7601.24550

85,504

05-Mar-2020

00:44

Wrpint.dll

6.1.7601.24550

54,272

05-Mar-2020

00:08

Xmllite.dll

1.3.1001.0

180,736

05-Mar-2020

00:44

References

For information on SSUs, see the following articles:

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

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