Thanks to Giuseppe Massoni (tech support) I have solved the problem above. It depends on some Windows Updating issue, however here some useful tips:
- Error code 1603: https://wiki.mcneel.com/it/rhino/6/install/error/1603
solved by Microsoft’s Fix
to avoid this screen errors run Microsoft’s Fix and remove this three:
- Rhino6;
- Rhino Engine Installer;
- Rhino Language Pack:
In my case it worked.


