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Servicing stack update for Windows 7 SP1 and Server 2008 R2 SP1: May 12, 2020

View products that this article applies to.

Applies to

  • Windows 7 for 32-bit Systems Service Pack 1
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

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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.

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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 KB4550738.

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File Information

File verification

File hash information
File name SHA1 hash SHA256 hash
Windows6.1-KB4555449-x86.msu FDFF2FBC283DED23C353F03C18BD7FE0D8BC1591 D4E3ED96C9F9B11F28A7B254A2694EF6C9FC16211E05E28FC98E061585A33814
Windows6.1-KB4555449-ia64.msu 504C48EC6FF1D800B111F0DEA3C4180BDD07DD7F 786AFB1D5876A8BE0A8F6D781F5A04A1647A9BD68A40792CD2B47364FD636BA9
Windows6.1-KB4555449-x64.msu AB8A5A479FC67F746F95465F8D6F03CA6E368FA0 6BA2330D090AAA484164D7781EB91D64DEE64D51D153D4E3C558F1A286DC7C2A


File attributes

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

For all supported x86-based versions
File name File version File size Date Time
Apds.dll 6.1.7601.24553 1,798,144 23-Apr-2020 01:09
Apircl.dll 6.1.7601.24553 223,744 23-Apr-2020 01:09
Apss.dll 6.1.7601.24553 201,216 23-Apr-2020 01:09
Cbscore.dll 6.1.7601.24553 845,824 23-Apr-2020 01:08
Cbsmsg.dll 6.1.7601.24553 28,672 23-Apr-2020 00:36
Cmiadapter.dll 6.1.7601.24553 120,320 23-Apr-2020 01:08
Cmitrust.dll 6.1.7601.24553 296,960 23-Apr-2020 01:08
Cmiv2.dll 6.1.7601.24553 2,040,832 23-Apr-2020 01:08
Cntrtextinstaller.dll 6.1.7601.24553 143,872 23-Apr-2020 01:08
Dpx.dll 6.1.7601.24553 257,024 23-Apr-2020 01:08
Drupdate.dll 6.1.7601.24553 174,080 23-Apr-2020 01:08
Drvstore.dll 6.1.7601.24553 324,096 23-Apr-2020 01:08
Esscli.dll 6.1.7601.24553 266,240 23-Apr-2020 01:09
Extendedsecurityupdatesai.dll 6.1.7601.24553 90,624 23-Apr-2020 00:36
Fastprox.dll 6.1.7601.24553 606,720 23-Apr-2020 01:09
Globalinstallorder.xml Not applicable 1,977,464 16-Apr-2020 19:43
Helpcins.dll 6.1.7601.24553 105,472 23-Apr-2020 01:09
Locdrv.dll 6.1.7601.24553 229,888 23-Apr-2020 01:09
Mofd.dll 6.1.7601.24553 192,000 23-Apr-2020 01:09
Mofinstall.dll 6.1.7601.24553 58,880 23-Apr-2020 01:09
Msdelta.dll 6.1.7601.24553 305,664 23-Apr-2020 01:09
Mspatcha.dll 6.1.7601.24553 35,328 23-Apr-2020 01:09
Oemhelpins.dll 6.1.7601.24553 151,040 23-Apr-2020 01:09
Pkgmgr.exe 6.1.7601.24553 209,920 23-Apr-2020 00:36
Poqexec.exe 6.1.7601.24553 123,904 23-Apr-2020 00:36
Repdrvfs.dll 6.1.7601.24553 302,080 23-Apr-2020 01:09
Smiengine.dll 6.1.7601.24553 697,344 23-Apr-2020 01:09
Smipi.dll 6.1.7601.24553 98,816 23-Apr-2020 01:09
Svcini.exe 6.1.7601.24553 16,384 23-Apr-2020 00:36
Wbemcomn.dll 6.1.7601.24553 363,520 23-Apr-2020 01:10
Wbemcore.dll 6.1.7601.24553 774,656 23-Apr-2020 01:10
Wbemprox.dll 6.1.7601.24553 29,184 23-Apr-2020 01:10
Wcmtypes.xsd Not applicable 1,047 26-Nov-2019 21:19
Wcp.dll 6.1.7601.24553 1,913,344 23-Apr-2020 01:10
Wdscore.dll 6.1.7601.24553 190,464 23-Apr-2020 01:10
Wmicmiplugin.dll 6.1.7601.24553 351,744 23-Apr-2020 01:10
Wmiutils.dll 6.1.7601.24553 85,504 23-Apr-2020 01:10
Wrpint.dll 6.1.7601.24553 54,272 23-Apr-2020 00:34
Xmllite.dll 1.3.1001.0 180,736 23-Apr-2020 01:10
For all supported ia64-based versions
File name File version File size Date Time
Apds.dll 6.1.7601.24553 3,342,336 23-Apr-2020 00:46
Apircl.dll 6.1.7601.24553 752,128 23-Apr-2020 00:46
Apss.dll 6.1.7601.24553 560,128 23-Apr-2020 00:46
Cbscore.dll 6.1.7601.24553 1,837,056 23-Apr-2020 00:45
Cbsmsg.dll 6.1.7601.24553 40,448 23-Apr-2020 00:45
Cmiadapter.dll 6.1.7601.24553 284,672 23-Apr-2020 00:45
Cmitrust.dll 6.1.7601.24553 987,136 23-Apr-2020 00:45
Cmiv2.dll 6.1.7601.24553 6,536,192 23-Apr-2020 00:45
Cntrtextinstaller.dll 6.1.7601.24553 357,376 23-Apr-2020 00:45
Dpx.dll 6.1.7601.24553 770,560 23-Apr-2020 00:46
Drupdate.dll 6.1.7601.24553 390,656 23-Apr-2020 00:46
Drvstore.dll 6.1.7601.24553 742,912 23-Apr-2020 00:46
Esscli.dll 6.1.7601.24553 1,011,200 23-Apr-2020 00:46
Extendedsecurityupdatesai.dll 6.1.7601.24553 218,112 23-Apr-2020 00:19
Fastprox.dll 6.1.7601.24553 2,100,224 23-Apr-2020 00:46
Globalinstallorder.xml Not applicable 1,977,464 12-Mar-2020 00:50
Helpcins.dll 6.1.7601.24553 187,904 23-Apr-2020 00:46
Locdrv.dll 6.1.7601.24553 803,328 23-Apr-2020 00:46
Mofd.dll 6.1.7601.24553 643,584 23-Apr-2020 00:46
Mofinstall.dll 6.1.7601.24553 193,024 23-Apr-2020 00:46
Msdelta.dll 6.1.7601.24553 890,880 23-Apr-2020 00:46
Mspatcha.dll 6.1.7601.24553 111,104 23-Apr-2020 00:46
Oemhelpins.dll 6.1.7601.24553 420,352 23-Apr-2020 00:46
Pkgmgr.exe 6.1.7601.24553 334,848 23-Apr-2020 00:20
Poqexec.exe 6.1.7601.24553 272,384 23-Apr-2020 00:19
Repdrvfs.dll 6.1.7601.24553 1,067,520 23-Apr-2020 00:46
Smiengine.dll 6.1.7601.24553 1,953,792 23-Apr-2020 00:46
Smipi.dll 6.1.7601.24553 186,880 23-Apr-2020 00:46
Svcini.exe 6.1.7601.24553 41,984 23-Apr-2020 00:19
Wbemcomn.dll 6.1.7601.24553 1,005,056 23-Apr-2020 00:46
Wbemcore.dll 6.1.7601.24553 2,947,072 23-Apr-2020 00:46
Wbemprox.dll 6.1.7601.24553 102,912 23-Apr-2020 00:46
Wcmtypes.xsd Not applicable 1,047 18-Nov-2018 02:59
Wcp.dll 6.1.7601.24553 5,137,408 23-Apr-2020 00:46
Wdscore.dll 6.1.7601.24553 600,576 23-Apr-2020 00:46
Wmicmiplugin.dll 6.1.7601.24553 940,544 23-Apr-2020 00:46
Wmiutils.dll 6.1.7601.24553 273,408 23-Apr-2020 00:46
Wrpint.dll 6.1.7601.24553 128,000 23-Apr-2020 00:46
Xmllite.dll 1.3.1001.0 449,024 23-Apr-2020 00:46
Apds.dll 6.1.7601.24553 1,798,144 23-Apr-2020 01:09
Apircl.dll 6.1.7601.24553 223,744 23-Apr-2020 01:09
Apss.dll 6.1.7601.24553 201,216 23-Apr-2020 01:09
Cbscore.dll 6.1.7601.24553 845,824 23-Apr-2020 01:08
Cbsmsg.dll 6.1.7601.24553 28,672 23-Apr-2020 00:36
Cmiadapter.dll 6.1.7601.24553 120,320 23-Apr-2020 01:08
Cmitrust.dll 6.1.7601.24553 296,960 23-Apr-2020 01:08
Cmiv2.dll 6.1.7601.24553 2,040,832 23-Apr-2020 01:08
Cntrtextinstaller.dll 6.1.7601.24553 143,872 23-Apr-2020 01:08
Dpx.dll 6.1.7601.24553 257,024 23-Apr-2020 01:08
Drupdate.dll 6.1.7601.24553 174,080 23-Apr-2020 01:08
Drvstore.dll 6.1.7601.24553 324,096 23-Apr-2020 01:08
Esscli.dll 6.1.7601.24553 266,240 23-Apr-2020 01:09
Extendedsecurityupdatesai.dll 6.1.7601.24553 90,624 23-Apr-2020 00:36
Fastprox.dll 6.1.7601.24553 606,720 23-Apr-2020 01:09
Globalinstallorder.xml Not applicable 1,977,464 16-Apr-2020 19:43
Helpcins.dll 6.1.7601.24553 105,472 23-Apr-2020 01:09
Locdrv.dll 6.1.7601.24553 229,888 23-Apr-2020 01:09
Mofd.dll 6.1.7601.24553 192,000 23-Apr-2020 01:09
Mofinstall.dll 6.1.7601.24553 58,880 23-Apr-2020 01:09
Msdelta.dll 6.1.7601.24553 305,664 23-Apr-2020 01:09
Mspatcha.dll 6.1.7601.24553 35,328 23-Apr-2020 01:09
Oemhelpins.dll 6.1.7601.24553 151,040 23-Apr-2020 01:09
Pkgmgr.exe 6.1.7601.24553 209,920 23-Apr-2020 00:36
Poqexec.exe 6.1.7601.24553 123,904 23-Apr-2020 00:36
Repdrvfs.dll 6.1.7601.24553 302,080 23-Apr-2020 01:09
Smiengine.dll 6.1.7601.24553 697,344 23-Apr-2020 01:09
Smipi.dll 6.1.7601.24553 98,816 23-Apr-2020 01:09
Svcini.exe 6.1.7601.24553 16,384 23-Apr-2020 00:36
Wbemcomn.dll 6.1.7601.24553 363,520 23-Apr-2020 01:10
Wbemcore.dll 6.1.7601.24553 774,656 23-Apr-2020 01:10
Wbemprox.dll 6.1.7601.24553 29,184 23-Apr-2020 01:10
Wcmtypes.xsd Not applicable 1,047 26-Nov-2019 21:19
Wcp.dll 6.1.7601.24553 1,913,344 23-Apr-2020 01:10
Wdscore.dll 6.1.7601.24553 190,464 23-Apr-2020 01:10
Wmicmiplugin.dll 6.1.7601.24553 351,744 23-Apr-2020 01:10
Wmiutils.dll 6.1.7601.24553 85,504 23-Apr-2020 01:10
Wrpint.dll 6.1.7601.24553 54,272 23-Apr-2020 00:34
Xmllite.dll 1.3.1001.0 180,736 23-Apr-2020 01:10
For all supported x64-based versions
File name File version File size Date Time
Apds.dll 6.1.7601.24553 2,172,928 23-Apr-2020 01:02
Apircl.dll 6.1.7601.24553 276,480 23-Apr-2020 01:02
Apss.dll 6.1.7601.24553 235,520 23-Apr-2020 01:02
Cbscore.dll 6.1.7601.24553 976,896 23-Apr-2020 01:02
Cbsmsg.dll 6.1.7601.24553 28,672 23-Apr-2020 01:02
Cmiadapter.dll 6.1.7601.24553 125,952 23-Apr-2020 01:02
Cmitrust.dll 6.1.7601.24553 479,232 23-Apr-2020 01:02
Cmiv2.dll 6.1.7601.24553 3,739,136 23-Apr-2020 01:02
Cntrtextinstaller.dll 6.1.7601.24553 170,496 23-Apr-2020 01:02
Dpx.dll 6.1.7601.24553 399,872 23-Apr-2020 01:02
Drupdate.dll 6.1.7601.24553 204,288 23-Apr-2020 01:02
Drvstore.dll 6.1.7601.24553 423,936 23-Apr-2020 01:02
Esscli.dll 6.1.7601.24553 440,320 23-Apr-2020 01:02
Extendedsecurityupdatesai.dll 6.1.7601.24553 103,936 23-Apr-2020 00:28
Fastprox.dll 6.1.7601.24553 909,824 23-Apr-2020 01:02
Globalinstallorder.xml Not applicable 1,977,464 12-Mar-2020 00:50
Helpcins.dll 6.1.7601.24553 142,336 23-Apr-2020 01:02
Locdrv.dll 6.1.7601.24553 370,176 23-Apr-2020 01:02
Mofd.dll 6.1.7601.24553 278,528 23-Apr-2020 01:02
Mofinstall.dll 6.1.7601.24553 76,288 23-Apr-2020 01:02
Msdelta.dll 6.1.7601.24553 452,096 23-Apr-2020 01:02
Mspatcha.dll 6.1.7601.24553 46,592 23-Apr-2020 01:02
Oemhelpins.dll 6.1.7601.24553 222,208 23-Apr-2020 01:02
Pkgmgr.exe 6.1.7601.24553 199,168 23-Apr-2020 00:28
Poqexec.exe 6.1.7601.24553 142,336 23-Apr-2020 00:28
Repdrvfs.dll 6.1.7601.24553 454,144 23-Apr-2020 01:02
Smiengine.dll 6.1.7601.24553 933,376 23-Apr-2020 01:02
Smipi.dll 6.1.7601.24553 104,448 23-Apr-2020 01:02
Svcini.exe 6.1.7601.24553 17,920 23-Apr-2020 00:28
Wbemcomn.dll 6.1.7601.24553 529,920 23-Apr-2020 01:02
Wbemcore.dll 6.1.7601.24553 1,220,096 23-Apr-2020 01:02
Wbemprox.dll 6.1.7601.24553 43,520 23-Apr-2020 01:02
Wcmtypes.xsd Not applicable 1,047 18-Nov-2018 02:57
Wcp.dll 6.1.7601.24553 2,762,752 23-Apr-2020 01:02
Wdscore.dll 6.1.7601.24553 271,872 23-Apr-2020 01:02
Wmicmiplugin.dll 6.1.7601.24553 525,824 23-Apr-2020 01:02
Wmiutils.dll 6.1.7601.24553 137,216 23-Apr-2020 01:02
Wrpint.dll 6.1.7601.24553 60,928 23-Apr-2020 01:02
Xmllite.dll 1.3.1001.0 198,656 23-Apr-2020 01:02
Apds.dll 6.1.7601.24553 1,798,144 23-Apr-2020 01:09
Apircl.dll 6.1.7601.24553 223,744 23-Apr-2020 01:09
Apss.dll 6.1.7601.24553 201,216 23-Apr-2020 01:09
Cbscore.dll 6.1.7601.24553 845,824 23-Apr-2020 01:08
Cbsmsg.dll 6.1.7601.24553 28,672 23-Apr-2020 00:36
Cmiadapter.dll 6.1.7601.24553 120,320 23-Apr-2020 01:08
Cmitrust.dll 6.1.7601.24553 296,960 23-Apr-2020 01:08
Cmiv2.dll 6.1.7601.24553 2,040,832 23-Apr-2020 01:08
Cntrtextinstaller.dll 6.1.7601.24553 143,872 23-Apr-2020 01:08
Dpx.dll 6.1.7601.24553 257,024 23-Apr-2020 01:08
Drupdate.dll 6.1.7601.24553 174,080 23-Apr-2020 01:08
Drvstore.dll 6.1.7601.24553 324,096 23-Apr-2020 01:08
Esscli.dll 6.1.7601.24553 266,240 23-Apr-2020 01:09
Extendedsecurityupdatesai.dll 6.1.7601.24553 90,624 23-Apr-2020 00:36
Fastprox.dll 6.1.7601.24553 606,720 23-Apr-2020 01:09
Globalinstallorder.xml Not applicable 1,977,464 16-Apr-2020 19:43
Helpcins.dll 6.1.7601.24553 105,472 23-Apr-2020 01:09
Locdrv.dll 6.1.7601.24553 229,888 23-Apr-2020 01:09
Mofd.dll 6.1.7601.24553 192,000 23-Apr-2020 01:09
Mofinstall.dll 6.1.7601.24553 58,880 23-Apr-2020 01:09
Msdelta.dll 6.1.7601.24553 305,664 23-Apr-2020 01:09
Mspatcha.dll 6.1.7601.24553 35,328 23-Apr-2020 01:09
Oemhelpins.dll 6.1.7601.24553 151,040 23-Apr-2020 01:09
Pkgmgr.exe 6.1.7601.24553 209,920 23-Apr-2020 00:36
Poqexec.exe 6.1.7601.24553 123,904 23-Apr-2020 00:36
Repdrvfs.dll 6.1.7601.24553 302,080 23-Apr-2020 01:09
Smiengine.dll 6.1.7601.24553 697,344 23-Apr-2020 01:09
Smipi.dll 6.1.7601.24553 98,816 23-Apr-2020 01:09
Svcini.exe 6.1.7601.24553 16,384 23-Apr-2020 00:36
Wbemcomn.dll 6.1.7601.24553 363,520 23-Apr-2020 01:10
Wbemcore.dll 6.1.7601.24553 774,656 23-Apr-2020 01:10
Wbemprox.dll 6.1.7601.24553 29,184 23-Apr-2020 01:10
Wcmtypes.xsd Not applicable 1,047 26-Nov-2019 21:19
Wcp.dll 6.1.7601.24553 1,913,344 23-Apr-2020 01:10
Wdscore.dll 6.1.7601.24553 190,464 23-Apr-2020 01:10
Wmicmiplugin.dll 6.1.7601.24553 351,744 23-Apr-2020 01:10
Wmiutils.dll 6.1.7601.24553 85,504 23-Apr-2020 01:10
Wrpint.dll 6.1.7601.24553 54,272 23-Apr-2020 00:34
Xmllite.dll 1.3.1001.0 180,736 23-Apr-2020 01:10

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References

For information on SSUs, see the following articles:

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

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Keywords: setup du, atdownload, kbbug, kbexpertiseinter, kblangall, kbsecbulletin, kbsecreview, kbsecurity, kbsecvulnerability, kbsurveynew, windows 7 sp1 update, windows server 2008 r2 sp1 update, kbfix

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Article Info
Article ID : 4555449
Revision : 14
Created on : 4/23/2020
Published on : 5/12/2020
Exists online : False
Views : 750