Through all these years, all the antivirus companies consider a keygen or a patch as a virus, but luckily 1 or 2 AV companies get past it, but all the others is following the old trend.
Âctually its True, the Keygen uses a Trojan to set up the game registry to create a valid Key. But this kind Of Trojan is specific made to just do what it should. Not other Harm or violation to your machine.
to be on the safe side he treats it as a virus.