I had the same problem. Turned out that the issue was I have a glass top desk. I tried a variety of things (restarting my computer, reinstalling/uninstalling the mouse, etc.) I happened to move the mouse onto a notebook and bumped it and noticed the cursor moved. May not be your issue, but for some reason it wouldn’t track on the glass top desk. Maybe there is some type of reflection confusing it? Not sure but thought I’d throw that out there for anyone else that has a glass desk.