I had the Noise lag issue which when you hit ESC it worked until the next set of sounds was needed. The Fix i saw was to set the priority for the game to high.
After doing that I've encountered a new problem. Doing anything in the game be it walking or running, shooting, or entering a door the game, every 3-5 minutes, will lock up or semi freeze for 30sec up to a minute. Have other people been having the same issue? Is there a Fix for it?