Im having trouble with playing bo2 zombies. the game wont fullscreen or go off a black screen, however, the sound is working for zombies and so is the multiplayer. is there anything i can do?

Grimm Blayze
@Grimm Blayze
Im having trouble with playing bo2 zombies. the game wont fullscreen or go off a black screen, however, the sound is working for zombies and so is the multiplayer. is there anything i can do?