When you try to extend the desktop to a secondary display while Windows Media Player is playing a video on the primary display, you may experience one or more of the following symptoms:
- Although the sound continues to play, the video may be missing.
- The video may stop, and when you try to start it again, you may receive an error message, or it may play sound without a video.
- You try to turn off the extended desktop on the secondary monitor while video is playing.
- You are using a third-party video playback program other than Windows Media Player.