The following information is as of May 31, 2017. I'm wondering if there is a better way when you read this article, so please keep it as a reference.
The version of scikit-learn used in the Windows environment is out of date [scikit-learn / General examples] (http://scikit-learn.org/stable/auto_examples/index.html) I noticed that some of the examples in the above did not work.
(1) PIP pip install scikit-learn I haven't created an environment on my Windows that can be built from source using Cython. This method was postponed.
(2) PyPI Look for scikit-learn on PyPI. https://pypi.python.org/pypi/scikit-learn https://pypi.python.org/pypi/scikit-learn/0.18.1 The type of OS you are using, The types of files that can be downloaded differ depending on whether Windows is 32bit or 64bit and Python is 2.7 or 3.5. scikit-learn-0.18.1.win32-py2.7.exe (md5)
Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)] on win32
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>>> import sklearn
>>> sklearn.__version__
'0.18.1'
>>>