What the tweaks do

Raises the scheduling priority of the audio engine, so footsteps and shot direction stay consistent.

Work Windows starts on its own and never shows anywhere. None of these lowers a buffer or a timeout Windows provides; each either turns a switch off or raises a restriction.

Reduces the time the display driver and desktop compositor take away from the game.

Enlarges the driver queue for input devices so clicks and keystrokes are never held up waiting to be processed.

Cuts background memory scanning and process count, and gives the file cache more room.

Speeds up boot and stops work that starts itself in the background while you play.