I just downloaded and scanned current version of the PK-Sharpner ZIP archive from their site - it's clean.
Further follow up:
I find disparaging and disrespectfull remarks from supposed "computer professionals" equally annoying.
I'm only glad the the real professionals here, such as Jeff Schewe, Andrew Rodney, Michael, etc. etc. refuse to partake in such behavior.
Just *my* opinion . . .
What makes you think that *ANY* Professionel Photographer knows anything about computers?
Computers is not what made them Professionel Photog's (ofcourse nowadays it is more computer based) but trust me two of the three (to my knowledge ) you mentioned, had already made it before the Digital Age became what it is today, which would give them the title Pro Photog.
So a contributer/member here, found a virus in a program that many of us here use, and by the looks of things he felt that he needed to express his concerns here.
This forum probably wasn't the right place to start, I for one, would have contacted PixelGenius first, to check if it was a common problem, before alerting the rest of the world.
It little bit of tolerance would go a long way here