Lenovo Y50-70 with a Nvidia GeForce GTX 860M no longer supported?

Hi, since upgrading to CC 2017 if have had a bit of a nightmare. Neither Premiere Pro nor After Effects seem to list my graphics card as support. It used to work flawlessly. I have updated my drivers to  9.18.13.45.05 (Nvidia Video Driver for Windows 8.1 (64-bit) - Lenovo Y50-70, Y50-70 Touch - Lenovo Support ) which is the latest for this laptop although it is marked as 17 March 2015. I can not seem to install any Nvidia specific drivers on my system.

This issue is causing me real headaches now so was wondering if there is a workaround or whether I will have to revert back to an older version. Any assistance would be appreciated.