Update to improve performance degradations in Mstscax.dll in Windows MultiPoint Server 2012

About this update
This article describes Remote Desktop device redirection performance on Windows Server 2012-based computers, especially Windows MultiPoint Server 2012. When USB redirected devices is used with Remote Desktop or MultiPoint stations, Mstscax.dll examines all devices instead of just the one being redirected.
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 provided as a Recommended update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The update is available for download from the Microsoft Download Center:

DownloadDownload the Windows MultiPoint Server 2012 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.

Update detail information

Prerequisites

To apply this update, you must have Windows MultiPoint Server 2012 installed on Windows Server 2012.

Registry information

To apply 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 doesn't replace a previously released update.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
File Information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Windows MultiPoint Server 2012

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
    6.2.920 0.17 xxxWindows MultiPoint Server 2012RTMGDR
    6.2.920 0.21 xxxWindows MultiPoint Server 2012RTMLDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
x64 Windows MultiPoint Server 2012
File nameFile versionFile sizeDateTimePlatform
Aaclient.dll6.2.9200.17434322,56009-Jul-201521:44x64
Aaclient.mofNot applicable1,26102-Jun-201214:30Not applicable
Mstscax.dll6.2.9200.176115,982,20818-Dec-201515:05x64
Mstscax.mofNot applicable2,05502-Jun-201214:31Not applicable
Tsgqec.dll6.2.9200.1638444,54426-Jul-201203:07x64
Aaclient.dll6.2.9200.21544322,56009-Jul-201520:16x64
Aaclient.mofNot applicable1,26102-Jun-201214:30Not applicable
Mstscax.dll6.2.9200.217305,981,69618-Dec-201514:31x64
Mstscax.mofNot applicable2,05502-Jun-201214:31Not applicable
Tsgqec.dll6.2.9200.1638444,54426-Jul-201203:07x64
Aaclient.dll6.2.9200.17434269,82409-Jul-201520:16x86
Aaclient.mofNot applicable1,26102-Jun-201214:30Not applicable
Mstscax.dll6.2.9200.176115,095,42418-Dec-201515:11x86
Mstscax.mofNot applicable2,05502-Jun-201214:31Not applicable
Tsgqec.dll6.2.9200.1638437,37626-Jul-201203:20x86
Aaclient.dll6.2.9200.21544269,82409-Jul-201519:29x86
Aaclient.mofNot applicable1,26102-Jun-201214:30Not applicable
Mstscax.dll6.2.9200.217305,095,42418-Dec-201514:39x86
Mstscax.mofNot applicable2,05502-Jun-201214:31Not applicable
Tsgqec.dll6.2.9200.1638437,37626-Jul-201203:20x86

Additional file information

x64 Windows MultiPoint Server 2012
File propertyValue
File nameAmd64_350a17274ab30df8bfb61ae193be9c8d_31bf3856ad364e35_6.2.9200.21730_none_73ecc205049f816e.manifest
File versionNot applicable
File size1,092
Date (UTC)18-Dec-2015
Time (UTC)22:29
PlatformNot applicable
File nameAmd64_380a2b583b875af67b08d4a14586d8e4_31bf3856ad364e35_6.2.9200.17611_none_0162789c62f3de10.manifest
File versionNot applicable
File size1,092
Date (UTC)18-Dec-2015
Time (UTC)22:29
PlatformNot applicable
File nameAmd64_microsoft-windows-t..s-clientactivexcore_31bf3856ad364e35_6.2.9200.17611_none_89004ca14f366dee.manifest
File versionNot applicable
File size128,454
Date (UTC)18-Dec-2015
Time (UTC)22:36
PlatformNot applicable
File nameAmd64_microsoft-windows-t..s-clientactivexcore_31bf3856ad364e35_6.2.9200.21730_none_8973494a68652c43.manifest
File versionNot applicable
File size128,454
Date (UTC)18-Dec-2015
Time (UTC)22:36
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,029
Date (UTC)18-Dec-2015
Time (UTC)22:29
PlatformNot applicable
File nameX86_microsoft-windows-t..s-clientactivexcore_31bf3856ad364e35_6.2.9200.17611_none_2ce1b11d96d8fcb8.manifest
File versionNot applicable
File size128,448
Date (UTC)18-Dec-2015
Time (UTC)22:36
PlatformNot applicable
File nameX86_microsoft-windows-t..s-clientactivexcore_31bf3856ad364e35_6.2.9200.21730_none_2d54adc6b007bb0d.manifest
File versionNot applicable
File size128,448
Date (UTC)18-Dec-2015
Time (UTC)22:36
PlatformNot applicable
Properties

Article ID: 3104431 - Last Review: 03/08/2016 18:25:00 - Revision: 2.0

Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows Multipoint Server 2012 Standard, Windows Multipoint Server 2012 Premium

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