Hello
There are 2 news, one good and one bad !
The good: I succeeded thanks to ERD Commander to return at
the last restore point, so the PC restarted.
The bad is that at the start I received from avast an error
that the version 5.1000 don't succeeded i installing himself regularity,
so the conclusion is that was just the updating to ver. 5.1000 to damage
the system, so I uninstall completely avast then I reinstall the previous version
and everything is good now.
I hope my adventure could useful to someone else
Alberto