To be able to play MP3 files, your Operating System must have the MP3 Codec.
Win 98 has it by default. If you use an early version of Win 95 that does not
install this Codec, you may obtain the latest version of Windows Media Player,
which installs the MP3 Codec into the Operating System. 

Download this from:

http://www.microsoft.com/windows/mediaplayer/download/Win32IE4x86.asp


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