Try www.lavasoftusa.com and grab ad-aware (be patient if it bounces you a bit). It's a spyware killing program that's nice and free. I don't think this has anything to do with Poser itself, but is likely something that came with some other program/shareware/etc. recently installed. The joys of people doing anything to make money now, including invading your computer....

A final note, be careful about what it says is and is not spyware. It does a good job in general, but is not always right. Very useful program, however.