if u punch Artemis into google, you would see that McAfee actively scans for new threats, and when it finds them it calls them Artemis (the name of McAfee's system that is searching your PC for these threats).
That's why it's called Artemis, because it doesn't know what virus it is, it just thinks it might be a virus.
Also, it looks like the P99 developers can put in a request with McAfee to have the file white-listed:
https://secure.mcafee.com/apps/mcafe...aspx?region=us