You will need to have all of the following media players installed on your system:

*Real Player version 9 or above, available free from
http://www.real.com/realplayer.html.

*Microsoft Windows Media Player version 9 or above, available free from
http://www.microsoft.com/windows/windowsmedia/default.aspx.

*QuickTime version 7 or above available free from
http://www.apple.com/quicktime/download/win.html.