Poser is trying to check the network for another instance of Poser to verify that it is legal. It's normal. On a network you can only have legal versions running at the same time, so if you had 1 copy of poser runing on 2 computers on a network, Poser goes and checks to see if it is the same version, if it is poser will shutdown and only allow 1 to be running at the same time, if it's a different serial then poser checks and verifys and lets you run both. Its a normal thing with Poser don't be scared. just set McAfee to allow Poser.exe to do it's thing and the messege will not appear again.