My game used to work just fine. Then, the screen would flicker to black, and my mouse would get messed up. My mouse would be in a part of a screen but it couldn't click anything. Usually about eight inches away, different things would light up/highlight, as if my mouse was over it but it wasn't. This caused major issues in playing. Sometimes, out of the blus, my game would just turn off out of nowhere. Now, I con't even open up the, game because my computer is rejecting the disc. It says that there either is no disc inserted or there is a "Disc Authentication Error." Please help me fix my game!