Right - remembered something about python giving me very nice error messages (probably over wrong version or 32bit vs 64bit) - along with pretty clear help on how to fix things. Just didn't remember exactly what small task (hit "y"/download+install - or set up env vars) I had to do to get everything to work. I do remember it was (for windows and c compilers) very easy.
I was also pleasantly surprised, building python C extensions under Windows is easy. Building some of the C or Fortran dependencies, on the other hand, might be not.