Plutonium

Hello, my bo1 is lagging and it also takes more than usual to load. It´s strange because it used to run smoothly and also bo2 runs with no issues. Please help.

I have an issue with my sound. When I enter the game with my headphones it works perfectly, but when they lose connection and I connect them again the game sound stops working. It´s set to 1% volume and I can´t change it. Same thing happens if I change the sound device while being in the game. It´s very annoying because if I try to high round on bo1 zombies I have to take breaks, I can´t be glued to the screen, so eventually it´s going to happen at one point of the game. Please, I would appreciate some help.