I use the same miner as you but when I launch it I get the following error:
WARNING: NVIDIA cannot load backend library: xmrstak_cuda_backend.dll
WARNING: NVIDIA Backend disabled
[2018-01-17 12:58:10] : WARNING: backend NVIDIA disabled.
And if I go to task manager and under services I do not see anything called backend NVIDIA which is supposed to be running when my computer starts up but it is not. I need to know how to get it running again.