Tigershark

I have Silent Hunter 4 Wolves of the Pacific,Silent Hunter 4 Wolves of the Pacific U Boat Missions(both brought from Steam) & also Silent Hunter 4 Wolves of the Pacific on a Ubisoft disc.
Each time I try to play any of these games all I see is "An administrator has blocked you from running this app"

I have verified the games,uninstalled & re-installed them and still only get the "An administrator has blocked you from running this app" message box.

Now, I am not brilliant when it comes to computers,more like install a game,then play it, so if anybody can help a not to bright computer user I would really appreciate any & all help,advice & suggestions.

Looking forward to some,hopefully, help with this.
Thanks