When I exrtracted the files, my antivirus (Norton) flagged the game as a virus-has anyone else had this happen when they tried to set up the game?
Some antivirus programs tend to flag Ren'Py games as false positives when they haven't been downloaded enough.
You can check the following links for more information:
https://lemmasoft.renai.us/forums/viewtopic.php?f=13&t=19895
https://lemmasoft.renai.us/forums/viewtopic.php?f=8&t=41570&hilit=false+positive