Windows Media Player cannot play the file. You might encounter
this error message for one of the following reasons:
A required codec is not installed on your computer. A codec is
software that the Player uses to decompress a file before playing
Typically, the Player automatically downloads and
installs required codecs as needed. However, the Player was unable
to download and install the required codec for this file, most
likely because a codec is not available for the content that you
want to play, or because the Internet security settings for your
browser are set too high and do not allow you to download the
Try adjusting your Internet security settings to
allow codecs to be downloaded to your computer.
The file that you are trying to play might not be supported by
Windows Media Player. For a list of file types (formats) that are
supported by Windows Media Player, see Supported file types.
To allow codecs to be downloaded to your computer
In Control Panel, click Internet Options.
Click the Security tab, and then click
In the Security level for this zone area, click
The security level is set to Medium.
For more information about setting Internet security levels, see
Microsoft Internet Explorer does not have to be
set as your default browser to download codecs or for Windows Media
Player to function properly.
You must be logged on as an administrator or a
member of the Administrators group to complete this procedure.
If you are unable to play the file after
completing this procedure, restart your computer, and then try to
play the file again.