Stewer's right. Task manager in XP Pro may take awhile to "kill" P5, but I think it's because there's a lot of stuff to shut down in Poser5. So far (knock on wood), I've not had any corruption problems after shutting down with the XP Task Manager. I don't have SR3. I read some of the problems that others were having installing it, etc. and never did install it. I do have the earlier SR's. I find that I have to "kill" less and less (probably because I've gotten familiar with what P5 will tolerate and what it won't). Generally when I do have to hit the "kill switch", it's a texture related problem.