When you switch away from Windows Media Center by using Alt +Tab or you switch between windows and maximized views, Windows Media Center displays a black screen, or you receive the error message "Cannot Play Video"
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On a computer that is running Windows Vista or Windows 7, you are playing an .mpg, .wmv, or .avi file-format movie in Windows Media Center. When you press Alt + Tab to switch away from Windows Media Center or Alt + Enter to switch between maximized and windows views, you experience one of the following symptoms:
You receive an error message that states that Windows Media Center has stopped working.
Windows Media Center displays a black screen.
The playback starts from the beginning.
You receive the following error message:
Cannot Play Video
Additionally, an error message that resembles the following is logged in the Application log:
Description: Faulting application ehshell.exe, version 6.0.6000.16386, time stamp TimeStamp, faulting module ntdll.dll, version 6.0.6000.16386, time stamp TimeStamp, exception code 0xc0000005, fault offset 0x0003b15f, process id ProcessID, application start time TimeStamp.
To work around this issue, use the mouse to minimize Windows Media Center or switch Windows Media Center out of full-screen mode before you press Alt + Tab to switch to another application.
For more information about Windows Media Center, visit the following Microsoft website: