Quote -
After you launch Poser, go into Task Manager. Find the Poser process in Processes. Right click and choose Set Priority ... Below Normal.

This means that Poser will run 100% CPU unless you try to do something else. Then it will briefly let your desktop or other applications respond immediately to your mouse and keyboard.

I do this all the time, because while I'm rendering, I browse the forums. The browser is really sluggish with Poser at normal priority, but fast as ever with Poser at below normal priority.

If you're not doing something else, Poser will still get 100% of the CPU for the render, so it doesn't really slow anything down while you're reading stuff.

I never thought to bring it up, but I've been doing that with Poser and other apps for a while now, although my Q9550 quad core doesn't have a problem running my browser or email while Poser is at normal priority, and nothing seems to make it really use the CPU at 100% through the entire render. It seems it always drops down to 50% then 25% halfway through.