I clicked on a link that devil sent me in a lobby and went to read what it was about. When I came back my game was in windowed mode and my mouse is not aligned with the game. I have tried going into setup--> options to fix the issue but this only gives me a white screen. I'm debating uninstalling and reinstalling the game in hopes that it would fix it but I was wondering if anyone knows a way to fix this.

ctrl(or alt) + enter give full screen.

Okay, usually what you can do to fix this is click a little bit lower than usual. Try doing that and go to settings-> options-> click at fullscreen. press okay. That should work, remember move your mouse lower than usual and click.

Sometimes the mouse won't press exactly where you click and will press around an inch above where u actually press. Make sure your pressing lower then usual if that's the case and go to settings - options and press full screen.