It just leans too much to play it.
Try to put the graphics down and what you do not need, if it still "there" then your laptop is too bad for this Assassin Creed.
As I understand it, your laptop is not good enough to play AC. You have to check the internet, what are the requirements for your AC part. Or, if you have no idea, you can write to me what kind of laptop you have and I could take a look.
If it lays on even your lowest graphics settings, only a laptop or a console will help.
Otherwise stop the graphics and screw down the resolution.
However, it does not look good anymore