HI,

I have testet the windows version on Windows7 64.

I start the program and the cudart32_50.dll or cudart64_50.dll was mist. I install cuda for windows https://developer.nvidia.com/cuda-downloads and than all run.
It can be that this is a sideeffect from switching to runtime library of cuda.

If an error shows that bitconminer.cpp:174 crash that the parameter -gpugrid to 256 or 512, it came from windows intern limit that no calculation on gpu can run longer than 4 sec.

With GT555M I get:

22.3 - 22.6 MHash/s with OpenCL
22.3 - 22.9 MHash/s with CUDA

I put allw links to reposetories and Errors to the top post.