audio, how can I fix it? Please don't give me answers such as try to run the DVDs with different program or check the codec and sound card and things as such, they use to run fine but now they just don't work properly and the DVDs are 100% original.
also all the DVDs on my hard disk work perfectly but the DVD-ROM playback has audio problem, I have checked my DVD-ROM in hard ware and software it's fine.
one more thing to solve this is that when I run the movie my PC becomes so slow and even the cursor moves so slowly and it happens only with movies and not other type of programs from DVD-ROM.

thanks