To log off Xbox Live outside the game follow the steps in this post. It’s how I do it. Also since you are using Steam, there was a problem way back when that had to do with the Steam engine and Geforce. I know I have that problem with ANNO 1800 and have to make sure Geforce and the new Intel Graphics don’t ‘auto optimize’ my games. Here is the link for the solutioin with DCH drivers. At least a couple of things to try. Since you are on Steam, have you turned of Cloud save and deleted those files in the folders? Could be corrupted cloud save.