Sound not playing in Quicktime

On a few files that I try to play in Quicktime, the sound doesn't work. I get a popup that says I need to download additional components and it takes my to a quicktime page from Apple.

Here it is: http://www.apple.com/quicktime/resources/components.html?os=OSX&ctype=61646563&csubtype=6d730050

I have already downloaded the Quicktime, but that has not fixed it. Anyone have an idea what I need to do?

You need to tell us more. What are the format of the files or where did they come from. Without knowing, I'd guess they are some kind of mpeg file and maybe streamclip will fix it.

It is an AVI file, downloaded it via torrents

It has done this to some other files that I have downloaded as torrents. It plays just with no sound. I might try some other media playback app and see if it still continues.

Have you tried a QuickTime ad-on such as Perian?

You could search the Movies and Video forum for the words; AVI no sound. That will get a few hits that look valid for your issue.