Estou recebendo este erro nesta linha:

from sklearn.ensemble import RandomForestClassifier

O log de erros é:

Traceback (most recent call last):
  File "C:\workspace\KaggleDigits\KaggleDigits.py", line 5, in <module>
    from sklearn.ensemble import RandomForestClassifier
  File "C:\Python27\lib\site-packages\sklearn\ensemble\__init__.py", line 7, in <module>
    from .forest import RandomForestClassifier
  File "C:\Python27\lib\site-packages\sklearn\ensemble\forest.py", line 47, in <module>
    from ..feature_selection.selector_mixin import SelectorMixin
  File "C:\Python27\lib\site-packages\sklearn\feature_selection\__init__.py", line 7, in <module>
    from .univariate_selection import chi2
  File "C:\Python27\lib\site-packages\sklearn\feature_selection\univariate_selection.py", line 13, in <module>
    from scipy import stats
  File "C:\Python27\lib\site-packages\scipy\stats\__init__.py", line 320, in <module>
    from .stats import *
  File "C:\Python27\lib\site-packages\scipy\stats\stats.py", line 241, in <module>
    import scipy.special as special
  File "C:\Python27\lib\site-packages\scipy\special\__init__.py", line 529, in <module>
    from ._ufuncs import *
ImportError: DLL load failed: The specified module could not be found.

Depois de instalar:

Python 2.7.4 para Windows x86-64scipy-0.12.0.win-amd64-py2.7.‌exe (deAqui)numpy-unoptimized-1.7.1.win-amd64-py2.7.‌exe (deAqui)scikit-learn-0.13.1.win-amd64-py2.7.‌exe (deAqui)

Alguém sabe por que isso está acontecendo e como resolvê-lo?