I have a CD/DVD writer and can hear sounds when I put a CD in that someone has recorded. BUT.... tonight I decided to try & watch a DVD from the movie store on my computer screen.... I can see it perfectly but no sound....I've checked all the settings I can think of and phoned my DD, and did her suggestions....but my question is.....how do I know if I have DVD hardware? The slot reads a DVD....but will it play it with sound???? anyone know how I can check this out?