Hm, what issues did you come across on Windows? I have it running on both a Windows PC and a Fedora PC. I uninstalled python, then installed the full installation of Anaconda. Then I followed the "Requirements" section of the readme and I was good to go.
Edit: Just noticed they removed the instructions from the readme for some reason. The requirements section can be found in this diff: https://github.com/basujindal/stable-diffusion/commit/487a0f...