Hello Guys :-D

I just downloaded a few videos, they successfully completed. But when I go to watch them, it shows video but theres no sound, Ive tryed installing DivX to see if it would make a difference but no luck, Ive also tryed alsorts of codec's but still nothing. What am I doing wrong!?

Ive searched and searched but all I get are these really complex jargon websites telling me to do this, do that... but it just doesnt work!

Please Help...  :-( 

Thanks

jesso568667