Game runs perfectly after disabling antivirus temporarily. Thanks very much.
Oh, thank Hefns, and there I thought I would have to call the 'olde Gods' for support as I was starting to worry. :D
Well, glad to see it works, but make sure to open your AntiVirus program and put Lupus.exe in Exception list (they all have some, sometimes called 'Whitelist' as well) so you don't have to repeat the disabling operation every time you start the game.