I've just followed the [windows installation](https://github.com/ros2/ros2/wiki/Windows-Install-Binary) and also got the `failed to create process` error. Turned out that choco installed Python 3.7, and as mentioned above, ros2 is expecting 3.6

I downgraded to 3.6.5, but I now get this error:

    Traceback (most recent call last):
      File "C:\dev\ros2\lib\demo_nodes_py\listener-script.py", line 11, in <module>
        load_entry_point('demo-nodes-py==0.5.1', 'console_scripts', 'listener')()
      File "C:\dev\ros2\Lib\site-packages\demo_nodes_py\topics\listener.py", line 37, in main
        rclpy.init(args=args)
      File "C:\dev\ros2\Lib\site-packages\rclpy\__init__.py", line 27, in init
        args if args is not None else sys.argv)
    RuntimeError: Failed to init: failed to load shared library of rmw implementation. Exception: Cannot load library: C:\dev\ros2\bin/rmw_fastrtps_cpp.dll, at C:\J\workspace\ci_packaging_windows\ws\src\ros2\rmw_implementation\rmw_implementation\src\functions.cpp:135, at C:\J\workspace\ci_packaging_windows\ws\src\ros2\rcl\rcl\src\rcl\rcl.c:92





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