This goes on - telling people who speak out negatively on Poser 5 that "they can speed up Poser", and the same ol' plug for how good Poser 5 is and it's "all the user's fault for buying it." (What, pray, are they to buy instead?) Gimme a break, and cut the original poster some slack. What Spit said is 100% correct. Poser 5 is significantly slower than Poser 4 / Propack ON THE SAME MACHINE, under the same conditions, each and every time you load it. Ergo the problem is with the creators of the code, not the user, not with the computer and not with the OS. Can you spend money to upgrade your system so as to get your performance back? Yes, but only if 2 conditions prevail: 1. You initially had a very slow machine with little memory - say 1GHz, 256MB on Win98/ME - and you upgrade to the latest and greatest P4 or AMD system with a very fast CPU AND a fast FSB AND 512MB or better memory AND Win2K or XP; and 2. You never install Poser 4 / Propack on your new system for a back-to-back comparison :-) IMO, outcha is correct, the UI design - at least those changes done by CL as against MetaCreations - are one of the 2 primary reasons for the slow down. Memory (mis-)usage is the other.