I have an AVI type file and my wmp + real player will not let me play it. I have sound but i do not have visual can anybody help? Is it my computer? Do i have to buy some sort of additional program to watch AVI type files? My other computer allows me to watch the file without any problems. I'm just curious why i can't watch it on my other computer.
Like sheed said, it is missing a Codec. Instead of downloading VLC, you could download the K-Lite Codec Basic program. It does wonders, and will allow you to play .avi.
I've installed K-lite for years, it's been tested virus free for all the years I am using. Not sure with your experience, but it's currently working perfectly fine for me.
I recommend what sheedatali said, try vlc, installing other codecs will solve the problem as well, but Vlc is still a better player than realplayer