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.
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 ).
File information
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 |
Download the package now.