Malware - a mechanical monstrosity with 700 eyes and 47667467 mech arms and legs along with some fire coming out of every hole in their body and also naturally anthro with unnecessary stripes ripped off of manipuware and visible ribs and like 9877849984729874 guns and more equipment along with 50 pet mechanical dragons and 2 portable black holes and who can go with 2 portable black holes without 2 portable white holes so 2 portable white holes too and a backpack/cage filled to the brim program slaves (most of them are dark green, just felt the need to say that) used as/for temporary minions/backup program hearts and a SECOND backpack on top of that backpack holding a million hijacked firewall for good measure.

Virus - basically the same as malware but magic/natural themed instead of tech

Program - literally just one change that is so small to the point where its not even worth mentioning

Firewall - literally just has a face now