Try this if it happens. Turn vsync on and then off again. See if that helps
My age of empires 3 fonts and shadows were pixelated/weird. I reinstalled drivers/etc didn't help. So after messing around with the ingame settings (no prob in other games) I turned vsync on and it was magically fixed
After I turned it off everything still good 
My age of empires 3 fonts and shadows were pixelated/weird. I reinstalled drivers/etc didn't help. So after messing around with the ingame settings (no prob in other games) I turned vsync on and it was magically fixed