DVD+-RW plays DVD video without sound
if you did not install the wires to the motherboard ( a small set of wires- I think it's 4-pin) it will not play the sound- ( that's if it requires that wire)
you can also uninstall it in device manager, restart and let windows re-install it again because software may have overwritten some important files-
finally the software that plays the dvd may be buggy in that it mutes the sound- check the toggle (it may be on mute on the screen) I always uninstall it and use interactual dvd player that comes with universal dvd's ( like the Bourne moveis next to me right now)
for stand alone software- I prefer Nero as Roxio overwrites everything- Nero is friendly- playing dvd's , burning etc...
Hope it works for you
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