You have parts of the objects missing, which is clearly a video driver settings problem. Try ALL the following, in order:
- Update your video driver
- Reset your video driver settings to default
- Reset the Prepar3D settings to default, by removing the following file:
%APPDATA%\Lockheed Martin\Prepar3d V4\Prepar3d.cfg
- Remove this folder, to force a shader rebuild:
%LOCALAPPDATA%\Lockheed Martin\Prepar3d V4
After the first startup, the screen will be blank for a while. This is normal. Just wait a couple of minutes, to have all shaders being rebuilt.