I have been trying to. i have been trying to reinstall Call of Duty 4: Modern Warfare and have

Question

i have been trying to reinstall Call of Duty 4: Modern Warfare and have been having trouble. i uninstalled the game and removed all other related files but the computer says that the game is still there, only when i run the disc. i can't uninstall it, it just quits the game, and i can't play it, again it just quits. i'm running vista 64 how do i go about fixing this?