Yeah, i've got quicktime 7, OS 10.3.9, and i cant play any .avi movies. Is there any alternative player that is free? It says that quicktime is missing some software, but it might be avaible online, then it pulls up the quicktime 3rd party software page. Is there a speical plug-in i need to download to play .avis in quicktime? Or any other programs i can use? Thanks guys Peter I could try converting it to mp4, what programs can i use for that?