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So I boot up and everything is fine until I log in,then I get a black screen and my cursor. People say hit Alt + Ctrl + F1 and then it asks for my login. I type in my regular log in, which is "jay", and my password and it says it's incorrect. I have no idea what to do. I'm having trouble grasping it. I'm pretty sure this problem was caused because I updated the nvidia graphics setting to the most recent, which I've come to find out isn't a good idea.