I get audio on other media players. I can play a CD and get audio. I got audio on Media Player Lite, so I was able to watch the movies, but my favorite, Power DVD CyberLink, no such l luck.
What version of Cyberlink (which is actually Roxio now, tee hee) Power DVD are you using?
I would say that if it's a free version that came with your PC then you could try updating it. You could also look into using VLC player
which is what I typically use for watching DVDs etc. because it doesn't have a ton of menus to navigate and will literally read any file thrown at it.