Microsoft KB Archive/943470

= A new instance of an MCML-based application starts when the ApplicationContext.ReturnToApplication method is called on a Windows Vista-based computer =

Article ID: 943470

Article Last Modified on 12/27/2007

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APPLIES TO


 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Home Premium
 * Windows Vista Ultimate

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SYMPTOMS
Consider the following scenario:
 * On a Windows Vista-based computer, you are running a Media Center Markup Language (MCML)-based application.
 * You switch to another application. Therefore, the MCML-based application is in the backstack.
 * The ApplicationContext.ReturnToApplication method is called.

In this scenario, you do not return to the original instance of the MCML-based application as expected. Instead, a new instance of the MCML-based application is started. Therefore, the application consumes extra resources when you restart it. If the application consumes lots of extra resources, this issue may affect system performance.



RESOLUTION
A hotfix is available to resolve this problem. After you apply this hotfix, the MCML-based application returns to its original instance when the ApplicationContext.ReturnToApplication method is called. Therefore, the application does not consume extra resources when you restart it.

Hotfix information
A supported hotfix is now 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 this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Vista service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You may have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.

File information
The English version of this hotfix 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.

Windows Vista, x64-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
When you run a Media Center extensibility application, and the ApplicationContext.ReturnToApplication method is called, you do not experience the problem that is described in the &quot;Symptoms&quot; section.

For more information, 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

Keywords: kbexpertiseadvanced kbfix kbqfe kbhotfixserver KB943470

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