Try updating your video drivers. Check the video card manufacturers website first for updates. If there aren't any, then try the main website for the type of video card (eg Nvidia, ATI etc) and download the latest drivers from there.
If you have onboard graphics, do the same thing, but check your Motherboard manufacturer's website for updates.
Otherwise, check your video card model is well within the specs of the game. If it is on the minimum specs side, this may be causing your problem as well as the video card can't create the external view properly as it isn't powerful enough.