Well, I have an XP system, Pentium, 256MB of RAM, and have no trouble like this in the hair room. (Other than not knowing exactly what I am doing, that is ;) Here is what I did before I installed Poser 5. 1) Defrag 2) Install the Windows Service Pack Update 1 (40 MB download) 3) Increase the size of my initial swap minimum to 700MB