Article ID: 2580442 - View products that this article applies to.
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Symptoms

Assume that you use Windows Media Player to open an HTTP URL with Microsoft Media Foundation on a computer that is running Windows 7. The URL has percent-escaping in the path and resembles the following:
http://<URL>/0%25a%23.wav
In this situation, Windows Media Player cannot play the content at the URL.

Note If you trace the network data, you notice that Windows Media Player sends an HTTP request for http://<URL>/0%a#.wav.

Cause

This issue occurs because the HTTP URL is not percent-escaped by the Media Foundation Net scheme plug-in before it is passed to Windows Internet (WinINet) or Windows HTTP Services (WinHTTP).

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 Web site:
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 or Windows Server 2008 R2 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 use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You have to restart the computer after you apply this hotfix if any application that uses Media Foundation is running on the computer.

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 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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.21xxxWindows 7RTMLDR
    6.1.760 1.21xxxWindows 7SP1LDR
  • 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 7" section. MUM and 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 sizeDateTimePlatform
Mf.dll12.0.7600.210073,181,56813-Jul-201104:33x86
Mf.dll12.0.7601.217693,207,68013-Jul-201105:54x86
For all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mf.dll12.0.7600.210074,068,35213-Jul-201105:31x64
Mfps.dll12.0.7600.21007206,84813-Jul-201105:31x64
Mf.dll12.0.7601.217694,120,06413-Jul-201105:22x64
Mfps.dll12.0.7601.17514206,84820-Nov-201013:26x64
Mf.dll12.0.7600.210073,181,56813-Jul-201104:33x86
Mf.dll12.0.7601.217693,207,68013-Jul-201105:54x86

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 nameUpdate.mum
File versionNot applicable
File size2,280
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameX86_9bc1e1eeded8c25e1ec87a4142070841_31bf3856ad364e35_6.1.7601.21769_none_a6ec9a12dc3fd904.manifest
File versionNot applicable
File size703
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameX86_a9faa520f41260533da214839d24faa9_31bf3856ad364e35_6.1.7600.21007_none_8384ea59fcf97c83.manifest
File versionNot applicable
File size703
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameX86_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21007_none_9d1783be86f057e9.manifest
File versionNot applicable
File size265,911
Date (UTC)13-Jul-2011
Time (UTC)14:27
PlatformNot applicable
File nameX86_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21769_none_9ebf29ae84456ae7.manifest
File versionNot applicable
File size265,911
Date (UTC)13-Jul-2011
Time (UTC)14:27
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameAmd64_3acd9d55639c1c42e71e7496766a57db_31bf3856ad364e35_6.1.7600.21007_none_2b4824a96af47e66.manifest
File versionNot applicable
File size1,056
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameAmd64_abed98a78335e593b1cf3401561c0988_31bf3856ad364e35_6.1.7601.21769_none_bb5a918998cfdbd5.manifest
File versionNot applicable
File size1,056
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameAmd64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21007_none_f9361f423f4dc91f.manifest
File versionNot applicable
File size265,915
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameAmd64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21769_none_faddc5323ca2dc1d.manifest
File versionNot applicable
File size265,915
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,296
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameWow64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7600.21007_none_038ac99473ae8b1a.manifest
File versionNot applicable
File size162,389
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable
File nameWow64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.21769_none_05326f8471039e18.manifest
File versionNot applicable
File size162,389
Date (UTC)13-Jul-2011
Time (UTC)14:21
PlatformNot applicable

Properties

Article ID: 2580442 - Last Review: June 21, 2014 - 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 kbexpertiseinter KB2580442

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