I used to play League of Legends, but I stopped playing it because my screen would turn a bunch of different colors and freeze. I set up a fan to blow inside the computer, and that kept it from freezing for a while, because I guess it was overheating, but then it started freezing even though there was a fan on it. So now I don't play at all. But now the card is causing my screen to go black whenever I watch youtube videos. The screen goes black and then cuts back on and shows a green screen where the video is playing. It also will basically shut off my monitor. Is there any way to just disable it and use the onboard graphics card (assuming there is one)? I don't care about having awesome graphics, I just want the thing to stay working when I try to watch youtube videos. Thanks.