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
https://www.microsoft.com/en-us/download/windows-media-player-details.aspx.

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