Hello i just got my first diablo! and i got some issues.. first with the colors already searched and fixed.. but now i have another problem like 20% of the screen is missing! i show a picture

( IMPORTANT!: when i take the picture using "Impr Pant" the screen appears normal but the colors are mess up dont worry i already fixed that , i just used paint to cut the image and thats how i really look the game on my screen! is annoying..)

Uploaded with ImageShack.us

Im using Windows 7 Home premium

i just want introduce to the game series but i got this :( i also have Diablo 2 and D2 hellfire