Help for a Windows Media Player Error Message

Error C00D11C0: 'Cannot play the file'
This is a very common error message and occurs when a file cannot be played due to an interrupted connection or broken link. If you receive this message while trying to play a video from the Internet, check your connection and try loading the video again. If you receive this message while trying to play a file from your desktop, the file may have been modified or the file path changed. Double-check the file's location, and if you clicked on a shortcut to try to get to the file, locate the target and launch the video from there.
Error C00D1163: 'Windows Media Player cannot play this DVD because a problem occurred with digital copyright protection'
The problem of video piracy is quite widespread in modern society, and many programs, including Windows Media Player, have safeguards to prevent DVDs from being copied using their software. However, these safeguards should not prevent you from actually watching the DVD. This error message may display if a part of the Windows Registry, more specifically the DVD decoder, has been corrupted. The easiest way to remedy this issue is to perform a System Restore to a point where you remember not encountering this error. If that doesn't work, you can look for online resources to download DVD decoders.
Error C00D10BD: No Dialogue
This error does not have accompanying dialogue, but even though it does not say what causes it explicitly, you can derive from its appearance that there is a problem with the system's drivers. Again, the easiest way to remedy this issue (if you have played DVD movies successfully before) is to perform a System Restore back to a date when you remember being able to play DVDs without this message popping up. If this method proves unsuccessful, try downloading the latest software update from Microsoft, which includes the latest drivers.