Doom3 display issue
 

When i play doom i get red dots every were which at first i ignored but its starting to annoy me can anyone help or does anyone have this problem (could it be because my graphics card things its secondary even though i turned my onvoard of and it shows the primary graphics card(radeon 9800) as the 9800 but you cant do anything with it if so how do i fix this and if not can you tell me anyway:) )