I bought COD 5 and says my video card of driver doesnt support seperate alpha blend, how do i fix this and pla?

every time i try and play i get "video card or driver doesn't support separate alpha blend glow will be disabled" i want to solve this without any money. how can i update or whatever so i can play|||You cant update hardware, return the game or get a new video card, your call. Your system doesnt meet the game's requirements.