I just recently swapped from a win98 machine to one with XP and the first thing I loaded on was poser now I can pose and render within minutes instead of sitting here twiddling my thumbs for hours waiting for windows to crash and take all my hard work with it. 3 weeks in and only 2 system crashes so far, with win98 I was lucky to get through an hour without it crashing. So I agree with cyber-organic go for XP and go WHOOOSH!!!!! just like I do now :)