if you tried it in a newer computer and it played fine the only possible thing I can think of is your cards might need to be updated on the older machine. Id say the file is corrupt but if it played ok on a newer machine then its not the file, nor is it your sound drivers ect. You can try reading some more threads on the forums. sorry I couldnt be of more help, outside of updating your drivers, which I dont think you need to do or, updating your graphics cards, which, Im not sure you'd want to go to that expense. have you tried other movie files on the same machine?