Are you sure about the translation ?
Especially the "The certificate/signature is blocked from the publisher", which maybe should read as "the publisher's certificate/signature is blocked" instead ? I don't read German, but the message seems odd and, instead, what really happened, is that YOU blocked "the Publisher" (which is "us", Virtuali), in your system, so nothing digitally signed by us will ever run, unless you re-trust us again.
To fix 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)