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