If it was 3 then there would’ve been some kind of notification from the AV (in fact if it is the AV doing it then the detection would’ve hit during installation not when the game is being started) and 6 wouldn’t be of much help if the OP has home premium installed and I know the rest aren’t necessary since I have that game (the original 2 disc version) and it works with no problems (but I am using the updated checkin.exe file).