text: why will my windows media player not play avi files?   to find out which codec your file needs, download the latest g-spot appliance from www.http://www.headbands.com/gspot, it's totally safe. when up and running, open your file with g-spot, render it and g-spot will give you the codec code you need to search for, most are best avi codecs are found at http://www.fourcc.org, which lists the corresponding codec codes. it's as easy as that :0)