You are correct layingback. SR2-1 was the last release I installed because SR2 was so crucial and it did get rid of the Interlok that was causing so many people problems. In fact I installed that before I ever ran Poser 5 (along with the figure updaters) If you open the readme on line for SR3, you can see what's improved and the speed is the major one. It may be that SR3 eliminates the habit Poser 5 has of still trying to connect with the internet. My firewall prevents it from making any connections, but I can still run the program quite successfully. I would guess that if the security mechanism were still in place, I wouldn't be able to run Poser 5 until the connection had been established.