dudalb: Norton's Antivirus does not like the Mafia Game.EXE file ether. Had to bring it out of guarantine.
I never had this problem with the Steam version. GOG messed up here.
Won't be much GOG can do about it*, as it will be the heuristics of the AV program giving a false positive. Heuristics is the prediction algorythm used to identify novel viruses, and it has (inevitably) a pretty dreadful rate of false positives since it is predictive. Which files get flagged is often pretty random and there's no sure fire way to prevent it happening, you can just whitelist it once it happens and if people let the AV know about it then they'll generally whitelist the file or amend the heuristics.
*Software which has had DRM removed is often flagged by heuristics as one of the methods used to remove DRM is similar to a method used to hide viruses in other executable files.