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Consider the following scenario. You watch Live TV or a DVD in Windows Media Center on a computer that is running Windows Vista Home Premium or Windows Vista Ultimate. You pause the video. Then, you use the Start menu, a sleep button on a keyboard, or a Windows Media Center remote control to put the computer to sleep. Finally, you wake the computer and then try to continue watching Live TV or the same DVD. In this scenario, you can view the video in Live TV or on the DVD. But you cannot hear the accompanying audio.
Note You can still hear audio in Windows Vista, in Windows Media Center, and in other programs.
Service pack information
To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
To work around this problem and to restore the audio, use one of the following methods:
Press the Play button on the Windows Media Center remote or on the multimedia keyboard.
Use the mouse to click the Play button at the bottom of the video screen.
Press the Pause button, and then press the Play button on the Windows Media Center remote or on the multimedia keyboard.
Resize the Windows Media Center window from full-screen mode to windowed mode or from windowed mode to full-screen mode.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.