I am running Zephyr ok in Xp 64 bit but when i change the hardware to GPU nvidia it is skipping back to reference platform

Thanks Christopher, I am following the vista installation thread to get pointers

Thanks for the link. I have looked at your previous posts on this topic but the solution seems to be for a linux system. I am still not able to run on GPU nvidia despite getting an all clear for the CUDA installation tests!

<t>When I try to run a simulation on OpenMM Zephyr and choose GPU nVidia on the simulation hardware tab i get this msg box "Reverting to Reference platform. You asked for GPU nVidia. Inspect log for details". Does anyone know why this is the case despite having installed CUDA 2.2 drivers/toolkit and...