Have you tried switching to SreeD preview? Does the crashes continue? If so, it may be somehow related to the OpenGL preview and ultimately some video driver.

My Poser is only slow if I have both Chrome with zillions of tabs open, + Photoshop + Hexagon. Other than that it's like previous versions. But it doesn't much like other programs running at the same time :) Greedy bugger ;)

FREEBIES! | My Gallery | My Store | My FB | Tumblr |
You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.