Late on this but, I would save that little old pc, put a plant on it, and rub it every morning for good luck with your new one. This problem may return.. try minimizing whole window and restore. then hit poseroom. close parameter box (gets printed through sometimes). hit materialroom again. No good? Look at bottom bar of your screen. Is there a button that says open? Right click and close. This is all I have on this at this point. P5 wigs out if there are any overlaps of screen functions. "Tools" look a little close to the Pose tab, for example.