This article describes the update that further improves the security of Windows Update (WU) / Microsoft Update (MU) client for Windows 8, Windows RT, Windows Server 2012, Windows 7 Service Pack 1 (SP1), and Windows Server 2008 R2 SP1.
Note Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 with update 2919355 already include these improvements.
More Information
Improvements
This update includes the following improvements:
- Further hardening of infrastructure files that are used by WU/MU client
- A more secure communication channel between the WU/MU client and service
Update information
How to obtain this update
This update will be rolled out gradually. It will be automatically installed if Automatic Updates is turned on and is either set to automatically install updates or notify to install updates.
This update can also be deployed through Windows Server Update Services (WSUS) or as a stand-alone package.
Deploying this update through WSUS
| Platform | Options |
|---|---|
| Windows 7 SP1 and Windows Server 2008 R2 SP1 |
|
| Windows 8 and Windows Server 2012 | Approve KB 2937636 using the Admin console so that it can be deployed together with other updates for Windows per your deployment schedule. |
Stand-alone packages for Windows 8 and Windows Server 2012
The following files are available for download from the Microsoft Download Center.
| Operating system | Update |
|---|---|
| All supported x86-based versions of Windows 8 (KB2937636) |
Download the package now. |
| All supported x64-based versions of Windows 8 (KB2937636) |
Download the package now. |
| All supported x64-based versions of Windows Server 2012 (KB2937636) |
Download the package now. |
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.
Stand-alone packages for Windows 7 SP1 and Windows Server 2008 R2 SP1
The following files are available for download from Windows Update.
| Operating system | Update |
|---|---|
| All supported x86-based versions of Windows 7 SP1 |
Download the package now. |
| All supported x64-based versions of Windows 7 SP1 |
Download the package now. |
| All supported x86-based versions of Windows Server 2008 R2 SP1 |
Download the package now. |
| All supported x64-based versions of Windows Server 2008 R2 SP1 |
Download the package now. |
| All supported Itanium-based versions of Windows Server 2008 R2 SP1 |
Download the package now. |
Registry information
To apply this update, you do not 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 does not replace a previously released update.
File information
The global version of this hotfix 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 7 and Windows Server 2008 R2 file information
For all supported x86-based versions of Windows 7
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| wuapi.dll | 7.6.7600.320 | 581600 | 5/14/2014 | 9:23 AM |
| wuapp.exe | 7.6.7600.320 | 33792 | 5/14/2014 | 9:17 AM |
| wuauclt.exe | 7.6.7600.320 | 54240 | 5/14/2014 | 9:23 AM |
| wuaueng.dll | 7.6.7600.320 | 1973728 | 5/14/2014 | 9:23 AM |
| wucltux.dll | 7.6.7600.320 | 2425856 | 5/14/2014 | 9:17 AM |
| wudriver.dll | 7.6.7600.320 | 92672 | 5/14/2014 | 9:17 AM |
| wups.dll | 7.6.7600.320 | 36320 | 5/14/2014 | 9:23 AM |
| wups2.dll | 7.6.7600.320 | 45536 | 5/14/2014 | 9:23 AM |
| wuwebv.dll | 7.6.7600.320 | 179656 | 5/14/2014 | 9:23 AM |
For all supported x64-based versions of Windows 7 and Windows Server 2008 R2
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| wuapi.dll | 7.6.7600.320 | 700384 | 5/14/2014 | 9:23 AM |
| wuapp.exe | 7.6.7600.320 | 36864 | 5/14/2014 | 9:20 AM |
| wuauclt.exe | 7.6.7600.320 | 58336 | 5/14/2014 | 9:23 AM |
| wuaueng.dll | 7.6.7600.320 | 2,477,536 | 5/14/2014 | 9:23 AM |
| wucltux.dll | 7.6.7600.320 | 2620928 | 5/14/2014 | 9:21 AM |
| wudriver.dll | 7.6.7600.320 | 97792 | 5/14/2014 | 9:20 AM |
| wups.dll | 7.6.7600.320 | 38880 | 5/14/2014 | 9:23 AM |
| wups2.dll | 7.6.7600.320 | 44512 | 5/14/2014 | 9:23 AM |
| wuwebv.dll | 7.6.7600.320 | 198600 | 5/14/2014 | 9:23 AM |
For all supported IA-64-based versions of Windows Server 2008 R2
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| wuapi.dll | 7.6.7600.320 | 1209312 | 5/14/2014 | 9:23 AM |
| wuapp.exe | 7.6.7600.320 | 75264 | 5/14/2014 | 9:12 AM |
| wuauclt.exe | 7.6.7600.320 | 106976 | 5/14/2014 | 9:23 AM |
| wuaueng.dll | 7.6.7600.320 | 4,444,128 | 5/14/2014 | 9:23 AM |
| wucltux.dll | 7.6.7600.320 | 3620352 | 5/14/2014 | 9:13 AM |
| wudriver.dll | 7.6.7600.320 | 190976 | 5/14/2014 | 9:12 AM |
| wups.dll | 7.6.7600.320 | 58336 | 5/14/2014 | 9:23 AM |
| wups2.dll | 7.6.7600.320 | 64992 | 5/14/2014 | 9:23 AM |
| wuwebv.dll | 7.6.7600.320 | 358856 | 5/14/2014 | 9:23 AM |
Windows 8 and Windows Server 2012 file information
For all supported x86-based versions of Windows 8
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| storewuauth.dll | 6.2.9200.16919 | 149504 | 5/14/2014 | 3:41 PM |
| wuaext.dll | 7.8.9200.16451 | 15872 | 11/5/2012 | 8:20 PM |
| wuapi.dll | 7.8.9200.16924 | 629248 | 5/14/2014 | 3:42 PM |
| wuapp.exe | 7.8.9200.16917 | 35328 | 5/14/2014 | 3:42 PM |
| wuauclt.exe | 7.8.9200.16917 | 52656 | 5/14/2014 | 4:08 PM |
| wuaueng.dll | 7.8.9200.16924 | 2,600,448 | 5/14/2014 | 3:42 PM |
| wucltux.dll | 7.8.9200.16919 | 1556992 | 5/14/2014 | 3:42 PM |
| wudriver.dll | 7.8.9200.16917 | 86528 | 5/14/2014 | 3:42 PM |
| wups.dll | 7.8.9200.16686 | 20992 | 8/15/2013 | 3:43 PM |
| wups2.dll | 7.8.9200.16686 | 21504 | 8/15/2013 | 3:43 PM |
| wusettingsprovider.dll | 7.8.9200.16917 | 216576 | 5/14/2014 | 3:42 PM |
| wushareduxresources.dll | 7.8.9200.16451 | 99328 | 11/5/2012 | 7:59 PM |
| wuwebv.dll | 7.8.9200.16917 | 128000 | 5/14/2014 | 3:42 PM |
For all supported x64-based versions of Windows 8 and Windows Server 2012
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| storewuauth.dll | 6.2.9200.16925 | 176,640 | 5/19/2014 | 4:24 PM |
| wuaext.dll | 7.8.9200.16451 | 17408 | 11/5/2012 | 8:20 PM |
| wuapi.dll | 7.8.9200.16925 | 773,632 | 5/19/2014 | 4:24 PM |
| wuapp.exe | 7.8.9200.16917 | 40448 | 5/14/2014 | 3:43 PM |
| wuauclt.exe | 7.8.9200.16925 | 59,416 | 5/19/2014 | 7:33 PM |
| wuaueng.dll | 7.8.9200.16925 | 3,286,528 | 5/19/2014 | 4:24 PM |
| wucltux.dll | 7.8.9200.16925 | 1,623,040 | 5/19/2014 | 4:24 PM |
| wudriver.dll | 7.8.9200.16925 | 100352 | 5/19/2014 | 4:24 PM |
| wups.dll | 7.8.9200.16693 | 49664 | 8/15/2013 | 10:21 PM |
| wups2.dll | 7.8.9200.16693 | 49152 | 8/15/2013 | 10:21 PM |
| wusettingsprovider.dll | 7.8.9200.16925 | 253440 | 5/19/2014 | 4:24 PM |
| wushareduxresources.dll | 7.8.9200.16451 | 99328 | 11/5/2012 | 8:00 PM |
| wuwebv.dll | 7.8.9200.16917 | 144384 | 5/14/2014 | 3:43 PM |
Windows RT file information
| File Name | File Version | File Size (bytes) | Date | Time |
|---|---|---|---|---|
| storewuauth.dll | 6.2.9200.16919 | 142,848 | 5/14/2014 | 3:23 PM |
| wuaext.dll | 7.8.9200.16451 | 16896 | 11/5/2012 | 7:24 PM |
| wuapi.dll | 7.8.9200.16924 | 643584 | 5/14/2014 | 3:23 PM |
| wuapp.exe | 7.8.9200.16917 | 33792 | 5/14/2014 | 3:23 PM |
| wuauclt.exe | 7.8.9200.16917 | 51632 | 5/14/2014 | 3:36 PM |
| wuaueng.dll | 7.8.9200.16924 | 2386432 | 5/14/2014 | 3:23 PM |
| wucltux.dll | 7.8.9200.16919 | 1550336 | 5/14/2014 | 3:23 PM |
| wudriver.dll | 7.8.9200.16917 | 86016 | 5/14/2014 | 3:23 PM |
| wups.dll | 7.8.9200.16693 | 22016 | 8/15/2013 | 7:47 PM |
| wups2.dll | 7.8.9200.16693 | 22528 | 8/15/2013 | 7:47 PM |
| wusettingsprovider.dll | 7.8.9200.16917 | 209408 | 5/14/2014 | 3:23 PM |
| wushareduxresources.dll | 7.8.9200.16451 | 99328 | 11/5/2012 | 7:08 PM |
| wuwebv.dll | 7.8.9200.16917 | 123904 | 5/14/2014 | 3:23 PM |
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates