Recently, my computer has been slowing way down. And in the past couple of days, it has gotten worse. The frame rate will drop drastically, and then the mouse will freeze up. I can still use the keys, then they will lock up too. And then my computer will start making this terrible noise, and shut down soon after. Now, it will start up for about 1 minute, and start screaming at me, then it just goes off, not shut down, it's like someone yanks the power cord out of it. What could this be?