Some of the movies that i play , the sound runs fast , its not that its not in sync, but doesn't get decompressed.
What do you mean? 1. Is your system up to the task of playing movies or do you have background apps running? 2. Open the movie up in GSpot, where it says "Bitrate", is there CBR in the value? or is it VBR? A lot of times, VBR can cause trouble with movies 3. All in all it sounds like a desynch problem? Are you sure the video framerate is set correctly?