Your security program *might* just not like .zip files or recognise the .arpack file type (as only ArtRage uses it) - are you able to download any others without problems?
I've downloaded that specific file myself without issues, though I can't guarantee you're getting exactly the same one, of course.
Your antivirus software must be giving you a false positive. I have download this package from this same site with no problems.
June.
Oh God of homeless things, look down
And try to ease the way
Of all the little weary paws
That walk the world
today. - Unknown.
http://enug66.deviantart.com/gallery/
[My setup: hp 15in laptop,11th Gen Intel Core i7-1165G7 @ 2.80GHz 2.70 GHz, 8.00 GB RAM, 24in Acer 2nd monitor, Huion Kamvas 20 Pro display tablet, Windows 11, ArtRage Vitae.
My painting real-estate is extended across three monitors.]