Alright, the game is brand new, it's from Ubisoft and not downloaded or burnt! I've tried running the game in safe mode, tried copying setup files. None of these have worked and the disk is not scratched. I've been trying to get technical support from the Ubi website but their suggestions have also been unsuccessfull. I assume it's because it isn't the game that has the problem.
And everyone STOP POSTING UNRELATED. STICK TO THE TOPIC. NO ONE CARES ABOUT SPELLING MISHAPS.