Things like this won't harm your computer if you don't click on them. They also don't automatically appear on your computer without clicking on the so said possible virus. If you wait until the 'Skip Ad' button appears in the top right of the screen, then you won't have to worry about a thing. You can also try removing the characters in the URL bar before "http://" as that is what leads the to adfly itself. The URL after the adfly URL leads directly to where you want or need to go.
You can always download and install uTorrent then get the provided Torrent download in the Download section of the forum. This doesn't lead to any direct link, or adfly, but has the FHsetup ready for you for an instant and safer download.