well, it is, but i just click "run anyway" and put in my dad's password (yes my dad has an account on my laptop -_-) so it will let me download it, but it just says that it was "corrupted" and i cant actually install it, im left with millions of Feral Heart files on my laptop that i have to delete 
Okay, first, go uninstall FH from control panel, and that should get rid of most of the files if not all. But, of for some reason its not there, you can go to Computer > Drive C and manually delete FH off your computer that way.
Then, you need disable your antivirus temporarily just long enough to download the FH installer one more time and run it. Hopefully then you won't have any problems. But if all else fails, you can just download FH's loose files since it doesn't actually *have* to be installed on a computer as long as the computer has DirectX 9 installed.