Your game is triggering my antivirus and in turn not working

TR/Crypt.XPACK.Gen That's the file that was found by my Avira antivirus, I don't know if it's a misleading name, or something you did this patch, but without it, I can't run the game, and I really don't know if it's safe to have. The program claims it's a Trojan horse because of the TR prefix, it even repaired it back in after I deleted the initial file. Mind telling me why it looks like a multi-million dollar company is trying to fuck up my computer?