from Microsoft http://support.microsoft.com/kb/279614

  • Open Windows Media Player, click Tools, and then click Options.
  • Click the Formats tab.
  • Click to clear the CD Audio Track check box, and then click Apply. Now, click to re-select the CD Audio Track check box, and then click Apply.
  • Click OK.
  • Now insert a CD-ROM, and it should automatically play with Windows Media Player.
  • If this does not work, you need to manually associate Media Player with audio CD-ROMs. In order to change this manually, follow these steps:
  • Right-click My Computer, and then click Explore.
  • Click Tools, click Folder Options, and then click the File Types tab.
  • In the Registered File Types box, click to select the (N/A) or (NONE) extension type, with a file type of AudioCD.

Note: There is no extension because it is referring to the format of an audio CD-ROM, which is not a regular file type, and therefore has no extension.

  • In Details for ‘AudioCD’ file type, click Advanced.
  • The Actions box should contain the choice Play. Click Play, and then click Edit.
  • Browse to the location of the Windows Media Player and select the executible; it should be similar to the following:
  • “D:\Program Files\Windows Media Player\wmplayer.exe” (including the quotation marks)
  • Add to the end of the line: /device:AudioCD “%L” (including the quotation marks).

The full path under “Application use to perform action:” should be similar to the following:

  • “D:\Program Files\Windows Media Player\wmplayer.exe” /device:AudioCD “%L”
  • Click to select Use DDE and then click OK to save your changes.
  • Now insert a CD-ROM, and it should automatically play with Windows Media Player.