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Article ID: 2820331 - Last Review: May 14, 2013 - Revision: 1.0

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Introduction

The Windows application compatibility update is a software update that improves the compatibility experience in Windows 7 and Windows Server 2008 R2. Microsoft regularly releases Windows compatibility updates to improve the overall user experience. 

For more information, refer to 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

Microsoft Update
This update is available from the following Microsoft Update website:
http://update.microsoft.com (http://update.microsoft.com)
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 7
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Download
Download the package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=b7011e1f-4a13-45ff-a708-621cd8f1d052)
All supported x64-based versions of Windows 7
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Download
Download the package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=d77af34f-3f37-4480-ac48-3494b06ff31c)
All supported x64-based versions of Windows Server 2008 R2
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Download
Download the package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=d28f7cdc-61fc-4e23-bf93-67ad70424c66)
All supported IA-64-based versions of Windows Server 2008 R2
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Download
Download the package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=990036a1-7151-493c-a675-d6080f8a0d35)
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  (http://support.microsoft.com/kb/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 7 or in Windows Server 2008 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, of the application, or of 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 7 and in Windows Server 2008 R2. The following are the most common: 

Hard block

The update puts a hard block on the application. A hard block prevents an application that is incompatible with Windows 7 or Windows Server 2008 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 update puts a soft block on the application. A soft block notifies you when primary functionality of the application is broken on Windows 7 or Windows Server 2008 R2, or causes instability of the application experience. 

Driver Block

This action 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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Application name Version Behavior after you install the update
Print Workshop2003Enables the application's functionality.
Nalpeiron ServiceNAEnables the application's functionality.
Visual Studio 2012 ExpressNAImproves user experience by warning the end-user, and then offering solution through URL.
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.

Prerequisites

To apply this update, you must be running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1.  For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932  (http://support.microsoft.com/kb/976932/ ) Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You do not have to restart the computer after you apply this update.

Hotfix replacement information

This update replaces the following updates:
  • 2492386  (http://support.microsoft.com/kb/2492386/ ) Application Compatibility Update for Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2: April 2011
  • 2762895  (http://support.microsoft.com/kb/2762895/ ) Application Compatibility Update for Windows Server 2008, Windows 7, and Windows Server 2008 R2: November 2012
  • 2791765  (http://support.microsoft.com/kb/2791765/ ) Application compatibility update for Windows 7 and Windows Server 2008 R2: March 2013

File information

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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 notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • 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:
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    VersionProductMilestoneService branch
    6.1.760 1.17xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • 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.
For all supported x86-based versions of Windows 7
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File nameFile versionFile sizeDateTimePlatform
Pcamain.sdbNot applicable44,93012-Apr-201323:27Not applicable
Pcamain.sdbNot applicable44,93012-Apr-201323:29Not applicable
Sysmain.sdbNot applicable4,080,53012-Apr-201323:33Not applicable
Sysmain.sdbNot applicable4,080,53012-Apr-201323:34Not applicable
Msimain.sdbNot applicable1,826,58212-Apr-201323:33Not applicable
Msimain.sdbNot applicable1,826,58212-Apr-201323:35Not applicable
Acgenral.dll6.1.7601.181282,176,51213-Apr-201304:45x86
Acgenral.dll6.1.7601.222982,176,51213-Apr-201304:55x86
Acspecfc.dll6.1.7601.18128474,62413-Apr-201304:45x86
Acspecfc.dll6.1.7601.22298474,62413-Apr-201304:55x86
Aclayers.dll6.1.7601.17974561,66416-Oct-201207:39x86
Drvmain.sdbNot applicable151,63012-Apr-201323:33Not applicable
Aclayers.dll6.1.7601.22298561,66413-Apr-201304:55x86
Acxtrnal.dll6.1.7601.22298212,48013-Apr-201304:55x86
Drvmain.sdbNot applicable151,63012-Apr-201323:35Not applicable
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For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Sysmain.sdbNot applicable125,34612-Apr-201323:31Not applicable
Sysmain.sdbNot applicable125,34612-Apr-201323:32Not applicable
Acgenral.dll6.1.7601.18128308,73613-Apr-201305:49x64
Acgenral.dll6.1.7601.22298308,73613-Apr-201305:18x64
Acspecfc.dll6.1.7601.18128111,10413-Apr-201305:49x64
Acspecfc.dll6.1.7601.22298111,10413-Apr-201305:18x64
Aclayers.dll6.1.7601.18128350,20813-Apr-201305:49x64
Acxtrnal.dll6.1.7601.18128135,16813-Apr-201305:49x64
Aclayers.dll6.1.7601.22298350,20813-Apr-201305:18x64
Acxtrnal.dll6.1.7601.22298135,16813-Apr-201305:18x64
Sysmain.sdbNot applicable4,080,53012-Apr-201323:33Not applicable
Sysmain.sdbNot applicable4,080,53012-Apr-201323:34Not applicable
Aclayers.dll6.1.7601.17974561,66416-Oct-201207:39x86
Drvmain.sdbNot applicable151,63012-Apr-201323:33Not applicable
Aclayers.dll6.1.7601.22298561,66413-Apr-201304:55x86
Acxtrnal.dll6.1.7601.22298212,48013-Apr-201304:55x86
Drvmain.sdbNot applicable151,63012-Apr-201323:35Not applicable
Acgenral.dll6.1.7601.181282,176,51213-Apr-201304:45x86
Acgenral.dll6.1.7601.222982,176,51213-Apr-201304:55x86
Acspecfc.dll6.1.7601.18128474,62413-Apr-201304:45x86
Acspecfc.dll6.1.7601.22298474,62413-Apr-201304:55x86
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For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Sysmain.sdbNot applicable122,32412-Apr-201323:27Not applicable
Sysmain.sdbNot applicable122,32412-Apr-201323:27Not applicable
Acgenral.dll6.1.7601.18128565,24813-Apr-201304:34IA-64
Acgenral.dll6.1.7601.22298565,76013-Apr-201304:33IA-64
Acspecfc.dll6.1.7601.18128241,66413-Apr-201304:34IA-64
Acspecfc.dll6.1.7601.22298241,66413-Apr-201304:33IA-64
Sysmain.sdbNot applicable4,080,53012-Apr-201323:33Not applicable
Sysmain.sdbNot applicable4,080,53012-Apr-201323:34Not applicable
Acgenral.dll6.1.7601.181282,176,51213-Apr-201304:45x86
Acgenral.dll6.1.7601.222982,176,51213-Apr-201304:55x86
Acspecfc.dll6.1.7601.18128474,62413-Apr-201304:45x86
Acspecfc.dll6.1.7601.22298474,62413-Apr-201304:55x86
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More information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

Applies to
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows 7 Starter
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
Keywords: 
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