Quote - Thanks for the feedback. The answer to all your questions CSpear is yes to all but the last. I will do that now. Wasn't even sure what to look for, so appreciate you pointing me in the right direction.

The program doesn't close. It just locks up. And, it appears to be an intermittent issue. For example, last night, I worked on it fine with no problems.

I'll take a look at the Nvidia card and see if I can get more stability. 

thanks again all!

It's your Nvidia openGL driver.  Go into render settings/preview and set transperency to actual and multi layer checked and textures to 1024. Should do the trick.

Don