You insert a DVD movie disc into your DVD drive, and then you select the option to play the DVD movie in Microsoft Windows Media Player 11. When you do this, a blank screen appears instead of the video. The audio plays. But the video does not play.

When you try to use Microsoft Windows Media Player 11, you may experience any of the following symptoms:

• You cannot view, add, or delete items in the library.
• When you try to use the Apply media information changes option, no changes are applied, and the progress indicator does not appear.
• You receive an error message that states that the library database has become corrupted.

When you click an mms:// link to listen to streaming audio using Microsoft Windows Media Player 11, you receive the following error message:

Windows Media Player cannot find the file.

When you click a DVD menu command in Microsoft Windows Media Player 11, nothing happens. This occurs when Windows Media Player 11 is in full-screen mode.

When you try to play a video file in Windows Media Player 11, the video does not play. However, the audio plays

Additionally, when you try to play an audio file or a video file in Windows Media Player 11, you may receive an error message that resembles one of the following error messages:

• Windows Media Player cannot play the file because the required video codec is not installed on your computer
.
• Windows Media Player cannot play, burn, rip, or sync the file because a required audio codec is not installed on your computer
• A codec is required to play this file. To determine if this codec is available to download from the Web, click Web Help.
• Invalid File Format.

If you plug in certain flash memory devices while you use Microsoft Windows Media Player 11 in Microsoft Windows XP, Windows Media Player may crash.