I don't know why or when exactly but I noticed that my dvd disappeared from my computer. I figured out how to bring it back but the sonic software will not connect to the drive now. The only suggestion I have gotten is a complete system restore which is not an accetable alternative at this point. The error I get is that there is a problem with an executable file called mediahub which is probably trying to access a corrupted dll file but which one. Does anybody have a clue? How about a compatible upgrade for the hardware (Lite-on DVDRW SHW-160H6S) in a windows xp media edition with SP3 operating environment.