RogueKiller Premium is an advanced version of the popular Anti-malware tool. Product description can be found here

Licenses are for the selected period.
With the “Technician” licence you can register an unlimited number of temporary machines, and up to 5 installed machines*.

Licenses for the Technician Version are PER SEAT.

(*activations are linked to primary hard drive. Dual boots are considered as different machines, as well as virtual machines)