Microsoft KB Archive/932519

= You may experience poor video playback performance when a tooltip appears in the video playback area on a computer that is running Windows Vista =

Article ID: 932519

Article Last Modified on 3/15/2007

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APPLIES TO


 * Windows Vista Ultimate
 * Windows Vista Starter
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Enterprise
 * Windows Vista Business 64-bit edition
 * Windows Vista Business
 * Windows Vista Ultimate 64-bit edition
 * Windows Vista Home Premium 64-bit edition
 * Windows Vista Home Basic 64-bit edition
 * Windows Vista Enterprise 64-bit edition

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SYMPTOMS
Consider the following scenario. One of the following conditions is true:
 * Your computer is running a version of Windows Vista that does not support the Windows Vista Aero theme. For example, your computer is running Windows Vista Home Basic.
 * Your computer is running a version of Windows Vista that supports the Windows Vista Aero theme. However, the video hardware of the computer does not support the Windows Vista Aero theme.

You watch a video. You move the mouse pointer over an area of the video playback program that causes a tooltip to appear. For example, a tooltip appears in Windows Media Player when you move the mouse pointer over any of the following video playback controls:
 * Play
 * Pause
 * Fast forward
 * Rewind

In this scenario, the video playback performance may be reduced suddenly. Additionally, you may notice lost frames or other poor video playback performance.

Note You notice the decrease in video playback performance only when the tooltip is present. After the tooltip disappears, video playback resumes as expected. The poor video playback performance may be more severe on computers that have slower CPU hardware.



WORKAROUND
To work around this behavior, do not move the mouse pointer over any area of the video playback program while you watch a video. By not moving the mouse pointer over this area, you prevent a tooltip from appearing.



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
This problem has been noticed only on computers that are running Windows Vista and that do not have the Windows Vista Aero theme present or enabled. For more information about why the Windows Vista Aero theme may not be present or enabled on your computer, click the following article number to view the article in the Microsoft Knowledge Base:

923883 You may not have the option to enable transparent glass effects in Windows Vista

Additional query words: stuttering glitching choppy freezing of frames Frame Rate Issues stutters

Keywords: kbtshoot kbprb kbexpertisebeginner KB932519

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