Game software error with message

As soon as i try to open the game I receive an error prompt that reads data 2 is not ready.
This kind of prompt first appeared at the time when I bought this game, but the thing is I cannot recall the steps that I took to correct this or Incase if I took any steps!
All I know is i used if after that, and it worked properly.
Does anyone know what steps I can take to do away with it?
