When I had Bitdefender installed it was a bit like that - very nanny-like with Aslain's modpack as well as modpacks I run on other games. Realised that after 35+ years of being tech savvy I could run on minimal AV input so Bitdefender (and any other system embedded AV programs) got the heave-ho and I don't get nagged.
Long story short: chuck Aslain a contribution for his time, bypass the file storage site links entirely, click the "direct" download link, and you get a clean download, no nasties.
Quick edit - if your username on here is your actual email address, I'd contact one of the admin to get that changed to something else pretty soon mate.....