Article ID: 2703902 - View products that this article applies to.
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Symptoms

When you play a .wav file in Windows Media Player on a computer that is running Windows 7, the playback stops several seconds before the end of the .wav file.

Note This issue does not occur in a previous Windows operating system, such as Windows XP and Windows Vista.

Cause

This issue occurs is caused by a design change in Windows 7. The Media Foundation (MF) source is used for parsing the .wav files in Windows 7. However, some issue occurs during the data chunk length computation for specific .wav files in the MF source.

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

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

Registry information

To apply this hotfix, 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 hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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 file information note
Important Windows 7 and Windows Server 2008 R2 updates are included in the same packages.
  • 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:
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.1.760 0 . 21xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1 . 21xxxWindows 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.
  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows 7" section. MANIFEST files and the associated security catalog (.cat) files, are extremely 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 all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
Mf.dll12.0.7600.211993,182,08024-Apr-201204:35
Mferror.dll12.0.7600.163852,04814-Jul-200901:06
Mfpmp.exe12.0.7600.1638523,04014-Jul-200901:14
Mfps.dll12.0.7600.21199103,42424-Apr-201204:35
Rrinstaller.exe11.0.7600.1638550,17614-Jul-200901:14
Mf.dll12.0.7601.219793,207,68024-Apr-201204:29
Mferror.dll12.0.7600.163852,04814-Jul-200901:06
Mfpmp.exe12.0.7600.1638523,04014-Jul-200901:14
Mfps.dll12.0.7601.21979103,42424-Apr-201204:29
Rrinstaller.exe11.0.7600.1638550,17614-Jul-200901:14
For all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mf.dll12.0.7600.211994,068,86424-Apr-201205:38x64
Mferror.dll12.0.7600.163852,04814-Jul-200901:28x64
Mfpmp.exe12.0.7600.1638524,57614-Jul-200901:39x64
Mfps.dll12.0.7600.21199206,84824-Apr-201205:38x64
Rrinstaller.exe11.0.7600.1638555,80814-Jul-200901:39x64
Mf.dll12.0.7601.219794,120,06424-Apr-201205:24x64
Mferror.dll12.0.7600.163852,04814-Jul-200901:28x64
Mfpmp.exe12.0.7600.1638524,57614-Jul-200901:39x64
Mfps.dll12.0.7601.21979206,84824-Apr-201205:24x64
Rrinstaller.exe11.0.7600.1638555,80814-Jul-200901:39x64
Mf.dll12.0.7600.211993,182,08024-Apr-201204:35x86
Mferror.dll12.0.7600.163852,04814-Jul-200901:06x86
Mfpmp.exe12.0.7600.1638523,04014-Jul-200901:14x86
Mfps.dll12.0.7600.21199103,42424-Apr-201204:35x86
Rrinstaller.exe11.0.7600.1638550,17614-Jul-200901:14x86
Mf.dll12.0.7601.219793,207,68024-Apr-201204:29x86
Mferror.dll12.0.7600.163852,04814-Jul-200901:06x86
Mfpmp.exe12.0.7600.1638523,04014-Jul-200901:14x86
Mfps.dll12.0.7601.21979103,42424-Apr-201204:29x86
Rrinstaller.exe11.0.7600.1638550,17614-Jul-200901:14x86

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 Media Foundation, visit the following Microsoft website:
General information about Media Foundation
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

Additional file information for Windows 7

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameX86_a39c48a3ff2d81b7ea0d9e2a9d57ebe3_31bf3856ad364e35_6.1.7601.21979_none_c9857520939acdd5.manifest
File versionNot applicable
File size703
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameX86_c1e9299d4f87867194f7e396b9fb27ae_31bf3856ad364e35_6.1.7600.21199_none_c8f309ee38eacbdb.manifest
File versionNot applicable
File size703
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameX86_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21199_none_9cb836ec87378337.manifest
File versionNot applicable
File size265,911
Date (UTC)24-Apr-2012
Time (UTC)22:20
File nameX86_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21979_none_9eb45d8e844d8126.manifest
File versionNot applicable
File size265,911
Date (UTC)24-Apr-2012
Time (UTC)22:20
Additional files for all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameAmd64_18931e248f2a2dab2f3fb11191919e0e_31bf3856ad364e35_6.1.7601.21979_none_5013e4ba9bd8c400.manifest
File versionNot applicable
File size1,056
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameAmd64_878b01f824960ccb6c072420d86d6edb_31bf3856ad364e35_6.1.7600.21199_none_4425c573d0067289.manifest
File versionNot applicable
File size1,056
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameAmd64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21199_none_f8d6d2703f94f46d.manifest
File versionNot applicable
File size265,915
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameAmd64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21979_none_fad2f9123caaf25c.manifest
File versionNot applicable
File size265,915
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameWow64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21199_none_032b7cc273f5b668.manifest
File versionNot applicable
File size162,389
Date (UTC)24-Apr-2012
Time (UTC)22:15
File nameWow64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21979_none_0527a364710bb457.manifest
File versionNot applicable
File size162,389
Date (UTC)24-Apr-2012
Time (UTC)22:15

Properties

Article ID: 2703902 - Last Review: July 12, 2012 - Revision: 2.0
Applies to
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced kbseo KB2703902

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