Microsoft KB Archive/936559

= Windows Media Center stops responding for about 30 seconds when you start TV playback on a Windows Vista-based Media Center computer =

Article ID: 936559

Article Last Modified on 7/7/2007

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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
You connect a Media Center Extender to a Windows Vista-based computer that includes the Windows Media Center feature. When you start TV playback on the computer, Windows Media Center stops responding for about 30 seconds.

Note Windows Vista Ultimate and Windows Vista Home Premium include the Windows Media Center feature.



CAUSE
This problem occurs because of an error in the way that the Round Trip Time (RTT) resiliency feature works together with the TCP Timestamps option.

Under some conditions, the RTT estimation of TCP may break the network connection. The RTT resiliency feature improves RTT estimations under these conditions.

When the RTT resiliency feature works together with the TCP Timestamps option, the RTT is longer than 30 seconds. When the RTT is longer than 30 seconds, TCP cannot perform the regular RTT estimation. Because the network connection is based on TCP, the network connection is broken. Therefore, Windows Media Center stops responding.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

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

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

Registry information
You do not have to make any changes to the registry to use one of the hotfixes in this package.

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, 64-bit version


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
After you apply this hotfix, Windows Vista enables the RTT resiliency feature only if the TCP Timestamps option is disabled. 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

