Same here. Task still running every time after closing the game. Win 7 64 Pro @ i5

My keypad on PC didn't work so I turned off numlock the first time I played, never happened again though. I think numlock needs to be off so you can use the keypad to play. The only problem i had was crashing on alt-tab several times. (I had this troll map of some evil guy's hide-out wanted to google it )

I dunno I kinda regret buying this game but well, lesson learned: never trust the reviews nor screenshots.