YOU blocked our publisher on your system! Nobody else can do it...
To Undo this, go to the Control Panel, under "Internet Options", look for the "Content" tab, there should be a "Publishers" button, that will list the software publishers that you trusted, and another tab with untrusted publishers. If you see "Virtuali s.a.s", remove it from both tabs (especially if it's under untrusted), so you should now see the trust requests again, which is the default behavior.
