A memory leak occurs when you repeatedly perform a "play-stop-play" operation in Windows Media Player 10 or in an application that uses the Windows Media Player 10 ActiveX control

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Consider the following scenario. You play some media content in Windows Media Player 10 or in an application that uses the Windows Media Player 10 ActiveX control. Next, you click the Stop button, and then you click the Play button. If you repeatedly perform this "play-stop-play" operation, a memory leak occurs. You can verify this memory leak by using one of the following methods:
  • In Windows Task Manager, notice that the memory usage increases during the "play-stop-play" operation.
  • In Performance Monitor (Perfmon.exe), add the Private Bytes counter and the Virtual Bytes counter. Then, notice that the values of these counters increase during the "play-stop-play" operation.
  • These counters are under the Process performance object in Performance Monitor.
  • This problem does not occur in Windows Media Player 11.
This problem occurs because some unnecessary memory is not released in the Wmp.dll assembly.

Update information

The following file is available for download from the Microsoft Download Center:
DownloadDownload the Update for Windows Media Player 10 (KB 967184) 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.


No prerequisites are required.

Restart requirement

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

Update replacement information

This update replaces update 949056.

Registry information

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

File information

The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTimePlatform
Wmp.dll10.0.0.407 15,537,79214-Apr-200908:31x86
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Article ID: 967184 - Last Review: 01/16/2015 11:00:57 - Revision: 4.0

  • Windows Media Player 10
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