Ok, I'm using a PC, this is my comp stats:

Operating System:
                        Windows 2.5.2.3790 (Service Pack 2)        
                    CPU Type:
                        Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
                    CPU Speed (GHz):
                        2.42
                    System Memory (GB):
                        5.998
                    Video Card Model:
                        ATI Radeon HD 4800 Series
                    Video Card Driver:
                        ati2dvag.dll
                    Desktop Resolution:
                        1600x1200
                    Hard Disk Size (GB):
                        465.646
                    Hard Disk Free Space (GB):
                        126.116

For some reason, whenever I open poser the last several months it goes extrordinarily slow, and I'm just talking about the meshes, not even the rendering speed.

My question is this.  What could be making it go slow, how di I fix it and should I get some money, what do I need to upgrade to make my computer a better 3D art machine?