Does anyone know any Home theater system that are compatitable with pc/windows xp?

i would like to hook up my system to my TV and also have the option to hook up to my computer

My system comes with 6pc with subwoofer and DVd player i would just like to be able to unplug the speaker and subwoofer from the dvd player and plug it into my pc to also listen to music is there a device can do that?