I am new at this so am trying to catch up.

Hello. Not getting a error message really all its doing it closing out on me . i have the newest Nero i just got it the other day . what am i to do . like do i shrink it then do the decypted it i was just trying any movie trying to get it to work i got one on my computer now i thought i could open Nero then go to the place were it is and download it but when i do that its not there