About this update

This article describes an update that contains some improvements to Windows Update Client in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2. This update has a prerequisite.

How to get this update

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is available on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center.

Operating system

Update

All supported x86-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

Note The update for Windows RT 8.1 can be downloaded only from Windows Update.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information

Prerequisites

To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2.

Registry information

To install this update, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update replaces the August 2015 Windows Update Client update (3075853).

The global version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows Server 2012 R2 file information and notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.17xxx

    Windows 8.1 and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for Windows 8.1 and Windows Server 2012 R2 aren't listed.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Wu.upgrade.ps.dll

7.9.9600.17729

11,776

14-Mar-2015

01:11

x86

Wuapi.dll

7.9.9600.18039

721,920

26-Aug-2015

18:00

x86

Wudriver.dll

7.9.9600.18039

81,920

26-Aug-2015

18:00

x86

Wups.dll

7.9.9600.17918

27,136

27-Jun-2015

02:14

x86

Windowsupdate.adml

Not applicable

36,980

15-May-2015

21:47

Not applicable

Windowsupdate.adml

Not applicable

35,954

15-May-2015

21:47

Not applicable

Windowsupdate.adml

Not applicable

38,258

15-May-2015

21:47

Not applicable

Windowsupdate.adml

Not applicable

64,380

15-May-2015

21:43

Not applicable

Windowsupdate.adml

Not applicable

33,083

15-May-2015

21:02

Not applicable

Windowsupdate.adml

Not applicable

38,428

15-May-2015

21:43

Not applicable

Windowsupdate.adml

Not applicable

37,431

15-May-2015

21:46

Not applicable

Windowsupdate.adml

Not applicable

41,195

15-May-2015

21:46

Not applicable

Windowsupdate.adml

Not applicable

39,976

15-May-2015

21:48

Not applicable

Windowsupdate.adml

Not applicable

38,658

15-May-2015

21:47

Not applicable

Windowsupdate.adml

Not applicable

43,481

15-May-2015

21:48

Not applicable

Windowsupdate.adml

Not applicable

38,302

15-May-2015

21:45

Not applicable

Windowsupdate.adml

Not applicable

34,864

15-May-2015

21:46

Not applicable

Windowsupdate.adml

Not applicable

36,608

15-May-2015

21:50

Not applicable

Windowsupdate.adml

Not applicable

39,599

15-May-2015

21:49

Not applicable

Windowsupdate.adml

Not applicable

38,695

15-May-2015

21:49

Not applicable

Windowsupdate.adml

Not applicable

38,618

15-May-2015

21:49

Not applicable

Windowsupdate.adml

Not applicable

59,982

15-May-2015

21:50

Not applicable

Windowsupdate.adml

Not applicable

35,246

15-May-2015

21:49

Not applicable

Windowsupdate.adml

Not applicable

37,607

15-May-2015

21:50

Not applicable

Windowsupdate.adml

Not applicable

29,864

15-May-2015

21:50

Not applicable

Windowsupdate.adml

Not applicable

30,190

15-May-2015

21:46

Not applicable

Windowsupdate.adml

Not applicable

30,190

15-May-2015

21:45

Not applicable

Wuapp.exe

7.9.9600.18039

29,696

26-Aug-2015

18:00

x86

Wuwebv.dll

7.9.9600.18039

124,928

26-Aug-2015

18:00

x86

Windowsupdateclient-core.ptxml

Not applicable

11,791

21-Aug-2013

23:40

Not applicable

Wuauclt.exe

7.9.9600.18039

128,568

27-Aug-2015

02:53

x86

Wuaueng.dll

7.9.9600.18039

3,066,368

26-Aug-2015

18:07

x86

Wups2.dll

7.9.9600.17918

23,552

27-Jun-2015

02:14

x86

Windowsupdate.admx

Not applicable

24,553

01-May-2015

23:33

Not applicable

Wuaext.dll

7.9.9600.17404

14,848

18-Oct-2014

06:29

x86

Wucltux.dll

7.9.9600.18039

2,173,440

26-Aug-2015

18:01

x86

Wusettingsprovider.dll

7.9.9600.18039

334,336

26-Aug-2015

18:00

x86

Winsetupui.dll

6.3.9600.17918

239,104

27-Jun-2015

03:08

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Wu.upgrade.ps.dll

7.9.9600.17729

15,360

14-Mar-2015

01:51

x64

Wuapi.dll

7.9.9600.18039

891,904

26-Aug-2015

14:27

x64

Wudriver.dll

7.9.9600.18039

95,744

26-Aug-2015

14:26

x64

Wups.dll

7.9.9600.17918

66,048

27-Jun-2015

03:08

x64

Windowsupdate.adml

Not applicable

36,980

15-May-2015

22:29

Not applicable

Windowsupdate.adml

Not applicable

35,954

15-May-2015

22:29

Not applicable

Windowsupdate.adml

Not applicable

38,258

15-May-2015

22:29

Not applicable

Windowsupdate.adml

Not applicable

64,380

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

33,083

15-May-2015

21:47

Not applicable

Windowsupdate.adml

Not applicable

38,428

15-May-2015

22:27

Not applicable

Windowsupdate.adml

Not applicable

37,431

15-May-2015

22:28

Not applicable

Windowsupdate.adml

Not applicable

41,195

15-May-2015

22:28

Not applicable

Windowsupdate.adml

Not applicable

39,976

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

38,658

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

43,481

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

38,302

15-May-2015

22:27

Not applicable

Windowsupdate.adml

Not applicable

34,864

15-May-2015

22:28

Not applicable

Windowsupdate.adml

Not applicable

36,608

15-May-2015

22:29

Not applicable

Windowsupdate.adml

Not applicable

39,599

15-May-2015

22:29

Not applicable

Windowsupdate.adml

Not applicable

38,695

15-May-2015

22:27

Not applicable

Windowsupdate.adml

Not applicable

38,618

15-May-2015

22:27

Not applicable

Windowsupdate.adml

Not applicable

59,982

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

35,246

15-May-2015

22:26

Not applicable

Windowsupdate.adml

Not applicable

37,607

15-May-2015

22:25

Not applicable

Windowsupdate.adml

Not applicable

29,864

15-May-2015

22:25

Not applicable

Windowsupdate.adml

Not applicable

30,190

15-May-2015

22:23

Not applicable

Windowsupdate.adml

Not applicable

30,190

15-May-2015

22:23

Not applicable

Wuapp.exe

7.9.9600.18039

35,840

26-Aug-2015

14:26

x64

Wuwebv.dll

7.9.9600.18039

140,288

26-Aug-2015

14:26

x64

Windowsupdateclient-core.ptxml

Not applicable

11,791

22-Aug-2013

06:45

Not applicable

Wuauclt.exe

7.9.9600.18039

136,904

27-Aug-2015

02:48

x64

Wuaueng.dll

7.9.9600.18039

3,705,344

26-Aug-2015

14:46

x64

Wups2.dll

7.9.9600.17918

52,224

27-Jun-2015

03:08

x64

Windowsupdate.admx

Not applicable

24,553

01-May-2015

23:33

Not applicable

Wuaext.dll

7.9.9600.17404

17,408

18-Oct-2014

06:50

x64

Wucltux.dll

7.9.9600.18039

2,240,512

26-Aug-2015

14:29

x64

Wusettingsprovider.dll

7.9.9600.18039

409,088

26-Aug-2015

14:27

x64

Winsetupui.dll

6.3.9600.17930

359,936

09-Jul-2015

18:40

x64

Wuapi.dll

7.9.9600.18039

721,920

26-Aug-2015

18:00

x86

Wudriver.dll

7.9.9600.18039

81,920

26-Aug-2015

18:00

x86

Wups.dll

7.9.9600.17918

27,136

27-Jun-2015

02:14

x86

Wuapp.exe

7.9.9600.18039

29,696

26-Aug-2015

18:00

x86

Wuwebv.dll

7.9.9600.18039

124,928

26-Aug-2015

18:00

x86

For all supported Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Wu.upgrade.ps.dll

7.9.9600.17918

12,288

27-Jun-2015

02:04

Not applicable

Wuapi.dll

7.9.9600.18039

679,424

26-Aug-2015

14:27

Not applicable

Wudriver.dll

7.9.9600.18039

79,360

26-Aug-2015

14:27

Not applicable

Wups.dll

7.9.9600.17918

27,136

27-Jun-2015

02:07

Not applicable

Windowsupdate.adml

Not applicable

36,980

27-Jun-2015

03:53

Not applicable

Windowsupdate.adml

Not applicable

35,954

27-Jun-2015

03:52

Not applicable

Windowsupdate.adml

Not applicable

38,258

27-Jun-2015

03:53

Not applicable

Windowsupdate.adml

Not applicable

64,380

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

33,083

27-Jun-2015

02:40

Not applicable

Windowsupdate.adml

Not applicable

38,428

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

37,431

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

41,195

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

39,976

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

38,658

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

43,481

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

38,302

27-Jun-2015

03:49

Not applicable

Windowsupdate.adml

Not applicable

34,864

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

36,608

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

39,599

27-Jun-2015

03:48

Not applicable

Windowsupdate.adml

Not applicable

38,695

27-Jun-2015

03:50

Not applicable

Windowsupdate.adml

Not applicable

38,618

27-Jun-2015

03:50

Not applicable

Windowsupdate.adml

Not applicable

59,982

27-Jun-2015

03:50

Not applicable

Windowsupdate.adml

Not applicable

35,246

27-Jun-2015

03:49

Not applicable

Windowsupdate.adml

Not applicable

37,607

27-Jun-2015

03:44

Not applicable

Windowsupdate.adml

Not applicable

29,864

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

30,190

27-Jun-2015

03:47

Not applicable

Windowsupdate.adml

Not applicable

30,190

27-Jun-2015

03:47

Not applicable

Wuapp.exe

7.9.9600.18039

29,184

26-Aug-2015

14:27

Not applicable

Wuwebv.dll

7.9.9600.18039

117,760

26-Aug-2015

14:27

Not applicable

Windowsupdateclient-core.ptxml

Not applicable

11,791

21-Aug-2013

23:34

Not applicable

Wuauclt.exe

7.9.9600.18039

128,616

27-Aug-2015

03:01

Not applicable

Wuaueng.dll

7.9.9600.18039

2,667,008

26-Aug-2015

14:28

Not applicable

Wups2.dll

7.9.9600.17918

23,040

27-Jun-2015

02:07

Not applicable

Windowsupdate.admx

Not applicable

24,553

26-Jun-2015

23:21

Not applicable

Wuaext.dll

7.9.9600.16384

15,872

22-Aug-2013

02:14

Not applicable

Wucltux.dll

7.9.9600.18039

2,124,800

26-Aug-2015

14:28

Not applicable

Wusettingsprovider.dll

7.9.9600.18039

306,688

26-Aug-2015

14:27

Not applicable

Winsetupui.dll

6.3.9600.17930

306,536

09-Jul-2015

17:14

Not applicable

References

See the terminology that Microsoft uses to describe software updates.

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