Game suddenly freezing

Hello, I am having a lot of issues with after about four minutes of game-play my client freezes. I have been playing it on the same computer for about a year now and I know my pc is fine to run the game. But lately I can't play any game without it "freezing". The music still works and the mouse moves but my video does not. My brother is having the same issue and he is on a different wifi with a way better computer. I have already uninstalled and reinstalled and the same thing.