This is a known issue we have with Windows 10 and Nvidia graphic cards on laptops, since Windows 10 december update. (viewtopic.php?f=69&t=2153&p=7902&hilit=nvidia#p7256)
Unfortunately we have not found how to fix it yet, but we are working on it.
As a work around, you can try to downgrade your graphic card driver.
You can find old drivers there: http://www.nvidia.fr/Download/Find.aspx?lang=en
You can also force Artlantis to use the internal graphic card instead of the Nvidia, it might get a little slow but it will work.
I do not think the rendering is slow because you are using the internal graphic card, because the final render uses only the CPU.
I would think it is more related to the rendering settings or the light or shader settings.
I think the bug with Nvidia is only a display on screen problem, at least for the final rendering window, the output image is correct, so you could try rendering with Artlantis and Nvidia graphic card active to see if the rendering is faster.
I have the exact same graphics card.
The latest working driver on my laptops is 382.05.
Hope this helps you?