On the top right of my first monitor, there is a strange rectangle that takes over my screen, it acts non-existent. I cannot click on it or anything of that nature. I've tried everything, simply rebooting my computer, changing monitor settings, even resetting monitor settings, I've even tried many random key combinations. Its very indescribable so I would have no idea what to search up. I don't know if this is a windows thing or not but I have no idea what else I would even post this on. Please help!