To make Windows Media Player your default media player, follow these steps:
1. In Windows Media Player, click Tools, and then click Options.
2. On the Formats tab, under Available File Formats, click Select All to select all of the file formats listed (or you can click to select each individual check box especially MP3 and wma).
3. Click Apply, and then click OK.
Windows Media Player is now your default media player for those selected media file formats.