Hello! My computer is a custom computer that I built, and it has been running extremely fast until last night. I moved it downstairs to attach it to the television, and upon doing so, things started running very slow. Now it is back upstairs and on its original display, but it is still running extremely slow. I tested my theory by playing a game that I had just played the day before, running flawlessly at 60fps, now when launching the game, I cannot even get past the menu screen because of lag. What might've happened and how can I fix it, please help!!