CORRECTION: When I checked the Taskmanager to see what was taking up the CPU
power I saw it was System Idle Process because the game window was not
highlighted and the game had paused. When I left taskmanager open while
playing the game, I saw that it was the game itself that was taking up most
of the cpu power. It is like this with all games: During the slowdown, it's
still the process of the game itself that is taking up the CPU power.
Therefore, I have no idea what could possibly be running in the background
that could be causing these slowdowns.