I've downloaded some avi video viles, but when I go to play them, I only get sound. I have Windows Media Player 10. Shouldn't I be able to play videos here? I have before (but not downloaded ones).

I've seen a lot of threads about codecs, but I am a computer beginner and I don't know what these are! If someone could please tell me step-by-step what to do to get these avi files playing that would be so helpful. I'm sorry I don't understand the other threads.

Thanks!