thinks MW is constantly running

For about a week now, has said “Playing Now” and won’t let me launch, uninstall, or scan & repair CoD: MW. I have tried everything I came across: from restarting my computer, to reinstalling both game and launcher (through Control Panel since the launcher thinks it’s being used,) to the series of steps on this very website. Nothing has worked, and as far as I can tell, no one else is having this problem.

Any ideas? At this point I’m willing to do anything other than get a refund.
Final point, I’m not sure if it makes a difference, but I have Windows 10.

Edit: Couple days later another game froze (unrelated). Restarted my comp to fix it and now the problem is gone?? I still have no idea what happened.