 So I went out and finally bought a wireless mouse because trying to play this game with a cable connected to your mouse is absolutely terrible... Well since I started using the wireless, it seems like I am clicking off the game somehow even though I locked my cursor to the correct monitor since Full Screen doesn't do it. It will act like I tabbed out and I have to click on my screen again for it to "tab" back in even though the game never actually tabs out.

  
After that happens, it's pretty much guaranteed that my game will eventually close down with no notice or error. I will just be fighting and it closes down everything. 

  
The clip shows the moment it closes down right at the end, the clip just ends because it is recorded through steam but that is when the game closes. I cannot get it to stop doing this and it has caused me to lose the end of the demo so many times.

  
I even tried the thing where you write directx11 in the launch options like has been suggested. I lock my cursor to my screen by adjusting my monitor set up in settings so the cursor can't go to my other screen. Not sure what else I could do :( 

  
Bought a nice mouse just to play this wireless and now it's pretty chalked, any help is appreciated

Game closing/crashing with no error?