Bought and installed AC2, played it for hours without any issues at all. Then one day after a longer break I started it up and it wouldn't/couldn't recognize my mouse!?

So now I can't continue my game, because the mouse is somehow "out of focus" and I can't seem to connect it properly when launching the game. Sooooo annoying and no help anywhere.

Suddenly it worked again, but the next day it failed on me once more... after several tries I have now given up on this game, which was great btw.