halo help combat evolved

when i install the game and then play and the main menu comes up i see the ring that your supposed to see at the main menu but it is white instead of the original color.


then when i play my campaign everything except the ground is white




any helpppppppppppppppppppp


plzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!!!!!

Did you get this game legally? Cus if you didnt, thats probablly the the problem.