Pariah164

So, I installed an older game on my computer (virus free), only to have it keep crashing. I gave up and uninstalled it. But now, I have a whole new set of problems. My highlight color has changed from blue to black, I have inexplicable black lines in places that shouldn't have them, words that SHOULD be gray are scrambled, and even my Firefox is affected. I'm not sure how to fix this... Here's a screencap: The Problem, screencapped. Can someone PLEASE help me? Thanks in advance.