Thanks tomos for the GPU options, but none of them work for my Nvidia GTX 860m 4 GB GPU on my Lenovo laptop. Not sure what is missing, as I tried both methods and followed instructions to the letter.

do you have latest driver for your NVIDIA?
Yes, I tried with latest driver from Nvidia, still same issue. Can you please check at your end?
i have available all tomorrow one very expensive nvidia tesla for testing, will try what soft is compatible with my pool
will post here my results..
also i will test that:
https://github.com/fireice-uk/xmr-stak-nvidia/releases/you can try it too, however i cannot tell you how exactly to change config