Hey ,what the hell it can't hurt

Reinstall sound drivers, and DVD program. But before u do that try to play a dvd with Windows Media player.
It could be the program, I am thinking about how I couldn't get any sound when playing Mp3's on MusicMatchBox. If I used any other program sound worked great, but not with MMB.
I had just upgraded my Videocard from a ATI 7200 to a Geoforce FX5200. The soundcard is Muse DVD 5.1. I also notice that I was not getting the Windows sound when I booted up.
I started not being able to get past the WinXp logo screen. Turns out it was my soundcard causing the problem.
Yeadon563