I have a Dell laptop. Pent 4, 1.8 gig processor, 40 gig hard drive, and 512 DDR Ram. Poser works fine on this machine. I haven't done things in the hair room, but I venture a guess that this machine would cough and wheeze, as would any machine that didn't have a gig of ram because the hair room is a RAM hog. I only render single figures and no backgrounds (still can't figure it out despite reading tutorials on it), and I'm able to do about 10 production renders of 800 x 800 without having to reboot.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi