Yeah mine starts up slower too maybe 2 to 3 min, with WIN XP PRO, it seems to me that render time is longer with the production settings, and the cloth room is slower and does strange things, one time the arms on the dress didnt move with the figure a couple of times it stopped calculating 3 to 5 frames before the end. I still have and SR3 back up on another hard drive that Im thinking about using instead, I`m hopeing there will be a SR4.1