Hello! It seems people have already answered, but I would like to put in my two cents since I had the same issue! Back when I got my laptop and new security software, it told me I couldn't download FH due to a possible virus. I think this has to do because of the fact FH is not an "official" website and the download comes from a url that isn't well known like mediafire or dropbox, etc. It is, however, completely confirmed that FH should not have a virus within its download, and if for some reason it does, Razmirz would have to be contacted immediately.
I highly doubt that could happen though! Temporarily turn off security and download the game, then pop it back on once it's all set and ready to go! ♡
I always use Chrome to download and download the game off of Mediafire. IT did the same to me, but on Chrome you can get the choice to actually keep the file and download it anyway.