This forum is English only. If you want to use italian, use email. Your problem is surely caused by a video driver problem.
- Download the latest video drivers for your card.
- Choose the option to do a clean installation
- If that doesn't fix it, clear the shaders, by removing this folder:
%LOCALAPPDATA%\Lockheed Martin\Prepar3D v4\Shaders
And wait a minute or two ( with a black screen, which is normal ) for the shaders to be rebuilt.
- If that still doesn't work, try to reset your p3D graphic settings, by removing this file:
%APPDATA%\Lockheed Martin\Prepar3d v4\prepar3d.cfg
