Now a days many gamers of Assassins Creed 2 are facing issue like they are unable to carry on their save game, or they are unable to install there game as it is asking for serial key to activate the game for playing the full game.
The actual issue is that as soon as gamers went in to animus a white screen appears with a rhombus like shape with an exclamation mark in it and games completely hangs up not allowing you to carry on forward. This issue of the gamers is the Animus Bug in the Assassins Creed 2.
One reason for it is that it is not the genuine copy of the Assassins Creed 2 and you are violating the copyright terms and condition of the game but it is you who decided what to do. if you want to have a crack for this Animus Bug in Assassins Creed 2 go to google and search for it you will definitely gonig to find the crack there you just need to download and install it.
The best solution what we can give you is that you go and Buy the genuine copy of Assassian Creed 2 and get rid of the problem you are facing including this Animus Bug, Other option for you is to download a save game and carry on your gameplay after this white screen the option is left to you to choose.