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Summary

This compatibility update is a software update that improves the compatibility experience in Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2. Microsoft regularly releases Windows compatibility updates to improve the overall user experience. 

This compatibility update is dated April 2014.

For more information about the improvements, see the "Applications or devices that experience a change in behavior after you install this update" section and the "Applications and devices that are included in this update" section.

More information

Update information

How to obtain this update

Windows Update

This update is available from Windows Update.
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
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Operating systemUpdate
All supported x86-based versions of Windows 8.1
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Download
Download the update package now.
All supported x64-based versions of Windows 8.1
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Download
Download the update package now.
All supported x64-based versions of Windows Server 2012 R2
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Download
Download the update 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.

The kinds of problems that are resolved by application compatibility updates

When you try to install and run certain games or applications in Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, you may experience one or more of the following symptoms:
  • The game, the application, or the driver is installed incorrectly.
  • The game, the application, or the driver causes system instability.
  • The primary functions of the game, the application, or the firmware do not work correctly.

Applications or devices that experience a change in behavior after you install this update

The following table lists the applications and devices that were included in this cumulative update package. This table also describes the behavior of these applications and devices after you install the update.

Compatibility updates trigger several changes in Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2. The following are the most common. 
Hard block
This prevents an application that is incompatible with Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2 from running on the system.

Note Microsoft enables Windows to put a hard block on a non-Microsoft application only if the manufacturer is notified.
Soft block
This notifies you when a primary function of the application may not work or may cause application instability.
Driver block
This may block an existing driver on your computer. When the driver is migrated during the upgrade, an Inbox driver will be installed.

Applications and devices that are included in this update

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Applications or DevicesVersionBehavior after you install the update
Music Stage1.6.225.0Improves the user experience of the application.
Chromazone1.0.3.0Improves the user experience of the application.
Math Karting1.0.0.5Improves the user experience of the application.
Nero 2014 Platinum - Blu-ray Player Chinese12.0.20064Improves the user experience of the application.
Office immersive appsnot availableImproves the user experience of the application.
Baidu Photo Manager (百度相片管家) Sim_Chinese2.0.2.100Application handles online-only OneDrive smart files correctly.
Netease Photo Manager (网易相片管家) Sim_Chinese1.0.1.8Application handles online-only OneDrive smart files correctly.
Avira apps10.*Blocks application installation.
Broadcom Virtual Wireless Adapternot availableBlocks installation of the driver because it affects system stability.

File information

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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.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2" 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.

For Windows RT 8.1
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File nameFile versionFile sizeDateTimePlatform
Acspecfc.dll6.3.9600.164279,72812-Oct-201321:13Not applicable
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For all supported x86-based versions of Windows 8.1
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File nameFile versionFile sizeDateTimePlatform
Acres.dll6.3.9600.16384310,78422-Aug-201304:16x86
Sysmain.sdbNot applicable3,834,19213-Mar-201400:37Not applicable
Msimain.sdbNot applicable2,726,82013-Mar-201400:37Not applicable
Acgenral.dll6.3.9600.170502,441,21613-Mar-201406:01x86
Drvmain.sdbNot applicable118,27213-Mar-201400:37Not applicable
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For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
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File nameFile versionFile sizeDateTimePlatform
Sysmain.sdbNot applicable433,54813-Mar-201400:34Not applicable
Msimain.sdbNot applicable2,757,38013-Mar-201400:34Not applicable
Drvmain.sdbNot applicable119,56213-Mar-201400:34Not applicable
Acres.dll6.3.9600.16384310,78422-Aug-201304:16x86
Sysmain.sdbNot applicable3,834,19213-Mar-201400:37Not applicable
Acgenral.dll6.3.9600.170502,441,21613-Mar-201406:01x86
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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

Additional file information

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Additional file information for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

Additional file information for Windows RT 8.1
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File propertyValue
File nameArm_4defb2f8c28d473f9741db2e35b9cbaf_31bf3856ad364e35_6.3.9600.17050_none_c2d68013b6e5d5a1.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_747a48ad5ce7536376e259de2236e74b_31bf3856ad364e35_6.3.9600.17050_none_01fbe39655f0e005.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_aecfaa4b070673ecfec029e9660f8dcc_31bf3856ad364e35_6.3.9600.17050_none_8dcc43702d699505.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_c82aecd69dba9863548c604759fcb2e0_31bf3856ad364e35_6.3.9600.17050_none_ec2934c714edff9f.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_e45636d54d6f8fb52e5565bd4aa7a349_31bf3856ad364e35_6.3.9600.17050_none_b136dd63969ce1e3.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17050_none_a0e0c12b0dce88ce.manifest
File versionNot applicable
File size3,312
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17050_none_a0e1c1750dcda225.manifest
File versionNot applicable
File size2,558
Date (UTC)13-Mar-2014
Time (UTC)09:25
PlatformNot applicable
File nameArm_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17050_none_a0e2c1bf0dccbb7c.manifest
File versionNot applicable
File size3,310
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17050_none_a0e3c2090dcbd4d3.manifest
File versionNot applicable
File size2,555
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
File nameArm_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17050_none_a0e6c2e70dc920d8.manifest
File versionNot applicable
File size1,867
Date (UTC)13-Mar-2014
Time (UTC)09:25
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,804
Date (UTC)13-Mar-2014
Time (UTC)17:56
PlatformNot applicable
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Additional files for all supported x86-based versions of Windows 8.1
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File propertyValue
File nameUpdate.mum
File versionNot applicable
File size1,805
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_3f6e3db9e16771a430c40339dcae218f_31bf3856ad364e35_6.3.9600.17050_none_5e629d9729788529.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_43c6ce17f1038ecb2f2002736b886701_31bf3856ad364e35_6.3.9600.17050_none_b7227650c2b8a904.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_d5be9c95cffc0e5a63e3b23b1c4d1e22_31bf3856ad364e35_6.3.9600.17050_none_8329e310f31a370f.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_eccebdcecd263b45e1e573ff5a89ac73_31bf3856ad364e35_6.3.9600.17050_none_9115688d1b7a61ee.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_fcc36e2daafa63b41b19c3e506c95c29_31bf3856ad364e35_6.3.9600.17050_none_1f0479ea9014f8ee.manifest
File versionNot applicable
File size725
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17050_none_a0de4ed30dd16a08.manifest
File versionNot applicable
File size3,312
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17050_none_a0df4f1d0dd0835f.manifest
File versionNot applicable
File size2,558
Date (UTC)13-Mar-2014
Time (UTC)10:15
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17050_none_a0e04f670dcf9cb6.manifest
File versionNot applicable
File size3,310
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17050_none_a0e14fb10dceb60d.manifest
File versionNot applicable
File size2,552
Date (UTC)13-Mar-2014
Time (UTC)10:15
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17050_none_a0e4508f0dcc0212.manifest
File versionNot applicable
File size1,867
Date (UTC)13-Mar-2014
Time (UTC)10:15
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
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File propertyValue
File nameAmd64_1754e24df216b3f566ac17cb7025355a_31bf3856ad364e35_6.3.9600.17050_none_18b44ebd0cbaa398.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_43c6ce17f1038ecb2f2002736b886701_31bf3856ad364e35_6.3.9600.17050_none_134111d47b161a3a.manifest
File versionNot applicable
File size727
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_8f27935a5c0b0ef3346899773f622d2b_31bf3856ad364e35_6.3.9600.17050_none_6be182a326d96be9.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_8f63e78c429bde14343f4bcd8c1f642e_31bf3856ad364e35_6.3.9600.17050_none_9f9a28a52ec105ff.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_a0f83ba705bef3e7052b91eff2dba670_31bf3856ad364e35_6.3.9600.17050_none_e788708bf7e6e40f.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_c04c1d8d48ea057b12ba0589ff0c7846_31bf3856ad364e35_6.3.9600.17050_none_a8bb1ab02e84f765.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_cce7175f6382f0b2f5730b7bcf10acca_31bf3856ad364e35_6.3.9600.17050_none_1d66e7cb00ce5b44.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_d5be9c95cffc0e5a63e3b23b1c4d1e22_31bf3856ad364e35_6.3.9600.17050_none_df487e94ab77a845.manifest
File versionNot applicable
File size727
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_de5c34066d2bc4c95bfd94254c066846_31bf3856ad364e35_6.3.9600.17050_none_b70867dbf891005f.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_ed6b6df456016b63c4e96efddd7b2c81_31bf3856ad364e35_6.3.9600.17050_none_b1c898ca9270fc43.manifest
File versionNot applicable
File size729
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17050_none_fcfcea56c62edb3e.manifest
File versionNot applicable
File size2,573
Date (UTC)13-Mar-2014
Time (UTC)12:49
PlatformNot applicable
File nameAmd64_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17050_none_fcfdeaa0c62df495.manifest
File versionNot applicable
File size2,562
Date (UTC)13-Mar-2014
Time (UTC)12:49
PlatformNot applicable
File nameAmd64_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17050_none_fcfeeaeac62d0dec.manifest
File versionNot applicable
File size3,336
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17050_none_fcffeb34c62c2743.manifest
File versionNot applicable
File size2,570
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameAmd64_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17050_none_fd02ec12c6297348.manifest
File versionNot applicable
File size1,869
Date (UTC)13-Mar-2014
Time (UTC)12:49
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,939
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameWow64_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17050_none_075194a8fa8f9d39.manifest
File versionNot applicable
File size3,314
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameWow64_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17050_none_075294f2fa8eb690.manifest
File versionNot applicable
File size1,141
Date (UTC)13-Mar-2014
Time (UTC)10:12
PlatformNot applicable
File nameWow64_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17050_none_07579664fa8a3543.manifest
File versionNot applicable
File size450
Date (UTC)13-Mar-2014
Time (UTC)10:12
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17050_none_a0e04f670dcf9cb6.manifest
File versionNot applicable
File size3,310
Date (UTC)13-Mar-2014
Time (UTC)17:57
PlatformNot applicable
File nameX86_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17050_none_a0e14fb10dceb60d.manifest
File versionNot applicable
File size2,552
Date (UTC)13-Mar-2014
Time (UTC)10:15
PlatformNot applicable
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References

For more information about previously released compatibility update for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 in 2014, click the following article numbers to view the articles in the Microsoft Knowledge Base:
2930157 Compatibility update is available for Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2: March 2014
2917929 Compatibility update is available for Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2: February 2014


Third-party information disclaimer

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The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
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Properties

Article ID: 2933809 - Last Review: April 17, 2014 - Revision: 1.1
Applies to
  • Windows 8.1 Enterprise
  • Windows 8.1
  • Windows 8.1 Pro
  • Windows RT 8.1
  • Windows Server 2012 R2 Datacenter
  • Windows Server 2012 R2 Essentials
  • Windows Server 2012 R2 Foundation
  • Windows Server 2012 R2 Standard
Keywords: 
atdownload kbfix kbsurveynew kbexpertiseadvanced KB2933809

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