If its saying that while your downloading? Retry and FH has no virus in the game program, so it is safe, if it isnt for game download
First many programs will say you have a virus when itself is a Virus trying to get you to install some software to remove it, so dont. Second, use YOUR virus protector so could be Norton, McAfee etc to remove the virus or look for one that is there. Besides that there isnt much many can do to help you since its not game wise.
FeralHeart Downloaders DO NOT have Virus's in the installer so they are safe~