what progam to use I got like 4 I have to watch but no program will play them I have tried DIVX Quicktime Window Media Player (Microsoft) Windows Media Player RealOne Player Internet Explorer
you need the codec for that version of .avi apparently. Go to divx.com and you should find a codec that will work. If all else fails, download and install the new DivX player 5.*
like they said get WMP9 if you dont have it already. Use google search for these and download the Nemo codec pack Then go to Kazaa and get the Ligos codec make sure you installed the DivX codec pack when you installed it i'm pretty sure it gives you the option not to. The DivX one pretty much works for almost all of them, only a odd few will use a different one.
do they not play at all? or video with no sound? sound with no video? choppy? it also could be that the file is incomplete.