I have searched the internet for quite a while and it appears my problem is in no way unique but I have yet to find solution that helps me. after installing I tried to play the game, it got as far the splash screen and then crashes my entire computer.
I recently purchased the total war complete pack on steam due to its massive discount and proceeded to install shogun 2, I downloaded it on my laptop then used the steam backup/restore function to transfer it to my main pc. I'm not sure if this is the right place to post a question such as this but I am not sure if there are any others stack exchanges that this would be more relevant to.