Man, I feel you, I have tried absolutely every single thing, I even formated my machine. There is two or three topics here about the subject, and one on steamforums, and no one solved it. I guess it have to do with CPU usage and AMD DUAL CORE compatibilty, because this game shouldn't use 90% of CPU. In my friends machines, the game only uses about 30% 20% of the CPU with similar specs. I hope we find a solution, but I already gave up ou South Park. Similar topic: http://steamcommunity.com/app/213670/discussions/0/558749824681605974/
Can you guys who are having stutterings/skippings post your configs and CPU percentage usage? Mine is Athlon x2 II 3.0GHZ, ATI Radeon 4650 HD, 4GB ram, with inexplicable 90% CPU usage when playing the game.