You frequently experience a music library issue when you access the music library in Windows Media Center or in Windows Media Center Extender

Applies to: Windows 7 EnterpriseWindows 7 Home PremiumWindows 7 Professional


You access a music library in Windows Media Center or in Windows Media Center Extender on a computer that is running Windows 7. However, it takes a long time before the music library becomes available.

This issue frequently occurs when you perform one of the following actions:
  • You shut down the Windows Media Center Extender by pressing the power button.

    Note In a typical situation, you click Tasks and then click Close to shut down the Windows Media Center Extender.
  • You shut down the computer unexpectedly. For example, you shut down the computer by pressing the power button while you are using Windows Media Center.
Note It can take several minutes to rebuild the music library, depending on the size of the library.


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: 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.


No prerequisites are required.

Restart requirement

You must 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 notes
  • 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 maintaining the state of the updated component. 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
File nameFile versionFile sizeDateTimePlatform
Avtransport.xml19,84222-Jul-200923:23Not applicable
Connectionmanager_dmr.xml5,37522-Jul-200923:23Not applicable
Dmr_120.jpg2,97922-Jul-200923:23Not applicable
Dmr_120.png14,87622-Jul-200923:23Not applicable
Dmr_48.jpg1,22022-Jul-200923:23Not applicable
Dmr_48.png4,26522-Jul-200923:23Not applicable
Prod_wmpplayer.ptxml1,39918-Mar-201003:02Not applicable
Renderingcontrol.xml6,36322-Jul-200923:23Not applicable
Wmp.mof4,88722-Jul-200923:22Not applicable
Wmpplayer-ppdlic.xrm-ms3,12318-Mar-201019:11Not applicable
Connectionmanager.xml5,42210-Jun-200921:46Not applicable
Contentdirectory.xml8,33810-Jun-200921:46Not applicable
Mediareceiverregistrar.xml2,57410-Jun-200921:46Not applicable
Wmpnetwk.mof4,78910-Jun-200921:46Not applicable
Wmpnss_bw120.jpg21,33010-Jun-200921:46Not applicable
Wmpnss_bw120.png6,43410-Jun-200921:46Not applicable
Wmpnss_bw32.bmp3,12810-Jun-200921:46Not applicable
Wmpnss_bw32.jpg8,99110-Jun-200921:46Not applicable
Wmpnss_bw48.bmp2,43210-Jun-200921:46Not applicable
Wmpnss_bw48.jpg10,91210-Jun-200921:46Not applicable
Wmpnss_bw48.png4,12410-Jun-200921:46Not applicable
Wmpnss_color120.jpg22,40810-Jun-200921:46Not applicable
Wmpnss_color120.png12,10710-Jun-200921:46Not applicable
Wmpnss_color32.bmp3,12810-Jun-200921:46Not applicable
Wmpnss_color32.jpg9,42110-Jun-200921:46Not applicable
Wmpnss_color48.bmp6,96810-Jun-200921:46Not applicable
Wmpnss_color48.jpg11,39710-Jun-200921:46Not applicable
Wmpnss_color48.png5,42610-Jun-200921:46Not applicable
For all supported x64-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Avtransport.xml19,84222-Jul-200923:36Not applicable
Connectionmanager_dmr.xml5,37522-Jul-200923:36Not applicable
Dmr_120.jpg2,97922-Jul-200923:36Not applicable
Dmr_120.png14,87622-Jul-200923:36Not applicable
Dmr_48.jpg1,22022-Jul-200923:36Not applicable
Dmr_48.png4,26522-Jul-200923:36Not applicable
Prod_wmpplayer.ptxml1,39918-Mar-201002:55Not applicable
Renderingcontrol.xml6,36322-Jul-200923:36Not applicable
Wmp.mof4,88722-Jul-200923:36Not applicable
Wmpplayer-ppdlic.xrm-ms3,12318-Mar-201018:57Not applicable
Connectionmanager.xml5,42210-Jun-200921:07Not applicable
Contentdirectory.xml8,33810-Jun-200921:07Not applicable
Mediareceiverregistrar.xml2,57410-Jun-200921:07Not applicable
Wmpnetwk.mof4,78910-Jun-200921:07Not applicable
Wmpnss_bw120.jpg21,33010-Jun-200921:07Not applicable
Wmpnss_bw120.png6,43410-Jun-200921:07Not applicable
Wmpnss_bw32.bmp3,12810-Jun-200921:07Not applicable
Wmpnss_bw32.jpg8,99110-Jun-200921:07Not applicable
Wmpnss_bw48.bmp2,43210-Jun-200921:07Not applicable
Wmpnss_bw48.jpg10,91210-Jun-200921:07Not applicable
Wmpnss_bw48.png4,12410-Jun-200921:07Not applicable
Wmpnss_color120.jpg22,40810-Jun-200921:07Not applicable
Wmpnss_color120.png12,10710-Jun-200921:07Not applicable
Wmpnss_color32.bmp3,12810-Jun-200921:07Not applicable
Wmpnss_color32.jpg9,42110-Jun-200921:07Not applicable
Wmpnss_color48.bmp6,96810-Jun-200921:07Not applicable
Wmpnss_color48.jpg11,39710-Jun-200921:07Not applicable
Wmpnss_color48.png5,42610-Jun-200921:07Not applicable
Avtransport.xml19,84210-Jun-200921:35Not applicable
Connectionmanager_dmr.xml5,37510-Jun-200921:35Not applicable
Dmr_120.jpg2,97910-Jun-200921:35Not applicable
Dmr_120.png14,87610-Jun-200921:35Not applicable
Dmr_48.jpg1,22010-Jun-200921:35Not applicable
Dmr_48.png4,26510-Jun-200921:35Not applicable
Prod_wow64_wmpplayer.ptxml1,39913-Jul-200921:03Not applicable
Renderingcontrol.xml6,36310-Jun-200921:35Not applicable
Wmp.mof4,88710-Jun-200921:34Not applicable


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

If the issue still occurs after you install the hotfix, you can perform one of the following actions:
  • Make sure that the music library is fully rebuilt before you exit Windows Media Center or Windows Media Center Extender.
  • Disable the media streaming or the media sharing feature in Windows Media Player. To do this, follow these steps:
    1. Open Windows Media Player, and then click Stream.
    2. If you see the "Turn on Media Streaming" option, media streaming is already disabled. Therefore, you do not have to continue to step 3.
    3. If you see the "More streaming options" option, click this option, and then click Block all to prevent everyone from playing your media.
    4. Click OK to apply the change, and then close Windows Media Player.
  • Prevent Windows Media Player from retrieving related media information from Internet. To do this, follow these steps:
    1. Open Windows Media Player, click Organize, and then click Options.
    2. Click the Privacy tab, and then clear the Update music files by retrieving media info from the Internet check box.
    3. Click OK to apply the change, and then close Windows Media Player.

Note This issue may occur when you add new assets to the music library.

For more information about how to enable media streaming in Windows Media Player, visit the following Microsoft Web site: For more information about Windows Media Player 12, visit the following Microsoft Web site: 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
File nameX86_30dc97ed6f062b40129b7dcf41eafbf7_31bf3856ad364e35_6.1.7600.20671_none_a2c081bc63ca3e18.manifest
File version
File size1,053
Date (UTC)19-Mar-2010
Time (UTC)01:56
PlatformNot applicable
File nameX86_a7415886d78953026d13c32a9cdbbc39_31bf3856ad364e35_6.1.7600.20671_none_1c5b2c26b4839d57.manifest
File version
File size702
Date (UTC)19-Mar-2010
Time (UTC)01:56
PlatformNot applicable
File nameX86_microsoft-windows-mediaplayer-core_31bf3856ad364e35_6.1.7600.20671_none_0bd0889dc98667d1.manifest
File version
File size568,606
Date (UTC)18-Mar-2010
Time (UTC)19:19
PlatformNot applicable
File nameX86_microsoft-windows-mediaplayer-wmpps_31bf3856ad364e35_6.1.7600.20671_none_aef11556b669f509.manifest
File version
File size144,891
Date (UTC)18-Mar-2010
Time (UTC)19:21
PlatformNot applicable
File nameX86_microsoft-windows-wmpnss-service_31bf3856ad364e35_6.1.7600.20671_none_03ed915149004faa.manifest
File version
File size166,044
Date (UTC)18-Mar-2010
Time (UTC)19:26
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7
File nameAmd64_0cf07877d108579e8dfc59cdaf9d6e8a_31bf3856ad364e35_6.1.7600.20671_none_fdeb5f67047073fe.manifest
File version
File size1,758
Date (UTC)19-Mar-2010
Time (UTC)01:56
PlatformNot applicable
File nameAmd64_cf4617ffcf27b9ed47127cb4d5cf2f8f_31bf3856ad364e35_6.1.7600.20671_none_6fd4cf94439ad0cc.manifest
File version
File size706
Date (UTC)19-Mar-2010
Time (UTC)01:56
PlatformNot applicable
File nameAmd64_microsoft-windows-mediaplayer-core_31bf3856ad364e35_6.1.7600.20671_none_67ef242181e3d907.manifest
File version
File size571,185
Date (UTC)18-Mar-2010
Time (UTC)20:11
PlatformNot applicable
File nameAmd64_microsoft-windows-mediaplayer-wmpps_31bf3856ad364e35_6.1.7600.20671_none_0b0fb0da6ec7663f.manifest
File version
File size144,893
Date (UTC)18-Mar-2010
Time (UTC)20:13
PlatformNot applicable
File nameAmd64_microsoft-windows-wmpnss-service_31bf3856ad364e35_6.1.7600.20671_none_600c2cd5015dc0e0.manifest
File version
File size166,048
Date (UTC)18-Mar-2010
Time (UTC)20:18
PlatformNot applicable
File nameWow64_microsoft-windows-mediaplayer-core_31bf3856ad364e35_6.1.7600.20671_none_7243ce73b6449b02.manifest
File version
File size599,842
Date (UTC)19-Mar-2010
Time (UTC)01:56
PlatformNot applicable