Hmm, you didn't remove the Chipset drivers when you ran driver sweeper, correct?
Also, you could try the preview driver (10.3a) just to see if it will install.
Thanks for the help. I reinstalled the chipset drivers, and then tried 10.2 again with no joy. I then tried 10.3a and it worked like a charm. After reading the update notes, I installed it on my Intel machine, and ran Unigine Heaven Benchmark.
A marked improvement over 10.2. I picked up 7 FPS and 166 points to overall score.
Thanks again for the headsup on the preview driver. (grinning ear to ear)