1) Diden't know it was The sound driver and i removed it in the"remove program installation" through "control panel". 2)uninstalled, and no i diden't try to restore since i'm not sure how. 3)There in a "Audio device on high definition audi bus" under "unknown devices" 4) it did appear in add/remove program,from there i removed it,and no diden't try repair option 5)The system came with everything on it completely,I don't have any disc.