im new to computers and computer games (2 months........i purchased call of duty 2 and tried it on my p/c it did not work a friend told me i needed to upgrade my graphics card.............this i did, i went to a computer store and purchased a graphic card,the store owner tolm me this card would support all new p/c games. my friend fitted the card and all was well...........after 4 weeks i was playing the game when suddenly the whole screen changed colour to a type of ladder effect with 3 different colours (light blue purple dark blue) this will not go away until i turn off my computer, then appears again after playing for 5 mins, as im new to this can any body out there help me thanks for reading this DOUG
