Plutonium

So i first got this error while remapping my keyboard controls. But it ended up giving me a black screen. I couldn't open any other application inculding task manager. I could bring up the task bar with the widows key, and preview windos but it would not switch to them.I had to force shutdown. I also did try the suggested answer above but it didn't seem to do any thing. So i just kept trying to clik the online button every now and then when i wanted to play zombies to try and see if it will let me this time. And on one attempt i decided to use my keyboard insted of my mouse and i was able to get all the way into a game but i wasnt able to move untill i relized what had happend the last time i played. I wanted to remap every single button because i ended up fat finger-ing my keyboard and died because of some controls i didn't know were there. As soon as i try click it gives me there error so all i did to fix the problem was grab one of my xbox controllers(because i had not choched the mapping on the controller side only keyboard) and went into options and reset controls to default. You probably dont need the xbox controller just need to rest default keybindings. Hope this will helps