I then decided to enable the on-board intel graphics and make use of that gpu to see what performance I might achieve, and I was shocked to discover that after I enabled it PD10 would crash upon starting. Something that I have never had happen. After trying a few times and rebooting it would not start, but would crash every time. I disabled the on-board graphics, however that did not stop PD10 from crashing upon start up. I then restored the system back to an earlier time when the on-board graphics had not been enabled and I can thankfully say, PD10 has returned to former self, and once again works superbly.
I mention all this because I have read from time to time, on this forum, about folk who cannot get PD10 to start, I begin to wonder if the onboard graphics card is something to consider as the problem. Perhaps mine is a one off. Intel Core i7 3770K 3.6 Ghz,
GTX 680, 2 X Benq23 3D monitors,
6G DDR3, Win 7 64, Win 10 (Insider) 64
PCIE SSD, Intel Sata SSD 2 500 Gbyte Seagate,
Minoru 3D WebCam, NVIDIA 3D Vision-Ready