I had the same issue that the mouse was the wrong icon (the standard windows one and not the BF1 looking cursor) and the keyboard was just ignored. It felt like there was something running over the top that wasn't letting me click on to the BF1 interface at all. So I went hunting for help. Another search on this suggests it's a Windows 10 update, but I hadn't updated Windows more recently than BF1 worked, so I took a look at what I had changed/installed. I'd put Discord on since. I uninstalled Discord and everything was right with the world again! Whether it was specifically Discord (which I suspect it was), or something to do with installing anything, I don't know for certain. Anyway, I can play again - happy days 🙂