Quicktime file formats

I'm trying to watch a quicktime movie but when ever I try I always get this message: QuickTime cannot open the file: "Transformers 01 - More Than Meets the eye 1.avi"
it is not a file that QuickTime understands (-2048)

What can I do about this?

Use Windows Media Player.

Quicktime can play avi's if they are encoded the way QT likes'em. It's not the format of choice though.

That's the problem. EVERY single time I try and install WMP it freezes before it starts.

Flip4Mac is a Quicktime add on that plays Windows media player files and its free.

http://flip4mac.com/

Try re-downloading it. Perhaps it's a corrupt DL. Also try VLC Player.

quicktime wont play avi files for me either... try mplayer or DivX Converter, or vlc.... I was able to play them but not with great quality, but they did play