fehler: Die native TensorFlow-Laufzeit konnte nicht geladen werden

ich bin neu in Tensorflow, heute habe ich Tensorflow installiert mit:

C:\>pip3 install --upgrade tensorflow
Collecting tensorflow
  Using cached tensorflow-1.2.0-cp35-cp35m-win_AMD64.whl
Requirement already up-to-date: bleach==1.5.0 in c:\python35\lib\site-packages (
from tensorflow)
Requirement already up-to-date: werkzeug>=0.11.10 in c:\python35\lib\site-packag
es (from tensorflow)
Requirement already up-to-date: html5lib==0.9999999 in c:\python35\lib\site-pack
ages (from tensorflow)
Requirement already up-to-date: protobuf>=3.2.0 in c:\python35\lib\site-packages
 (from tensorflow)
Requirement already up-to-date: backports.weakref==1.0rc1 in c:\python35\lib\sit
e-packages (from tensorflow)
Requirement already up-to-date: markdown==2.2.0 in c:\python35\lib\site-packages
 (from tensorflow)
Requirement already up-to-date: numpy>=1.11.0 in c:\python35\lib\site-packages (
from tensorflow)
Requirement already up-to-date: six>=1.10.0 in c:\python35\lib\site-packages (fr
om tensorflow)
Requirement already up-to-date: wheel>=0.26 in c:\python35\lib\site-packages (fr
om tensorflow)
Requirement already up-to-date: setuptools in c:\python35\lib\site-packages (fro
m protobuf>=3.2.0->tensorflow)
Installing collected packages: tensorflow
Successfully installed tensorflow-1.2.0

wenn ich versuchte Tensorflow zu importieren, wirft es:

C:\>python
Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:18:55) [MSC v.1900 64 bit (AM
D64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import tensorflow as tf
Traceback (most recent call last):
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 18, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\Python35\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 666, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 577, in module_from_spec
  File "<frozen importlib._bootstrap_external>", line 906, in create_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
ImportError: DLL load failed: The specified module could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", l
ine 41, in <module>
    from tensorflow.python.pywrap_tensorflow_internal import *
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 21, in <module>
    _pywrap_tensorflow_internal = swig_import_helper()
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 20, in swig_import_helper
    return importlib.import_module('_pywrap_tensorflow_internal')
  File "C:\Python35\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named '_pywrap_tensorflow_internal'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python35\lib\site-packages\tensorflow\__init__.py", line 24, in <modu
le>
    from tensorflow.python import *
  File "C:\Python35\lib\site-packages\tensorflow\python\__init__.py", line 49, i
n <module>
    from tensorflow.python import pywrap_tensorflow
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", l
ine 52, in <module>
    raise ImportError(msg)
ImportError: Traceback (most recent call last):
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 18, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\Python35\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 666, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 577, in module_from_spec
  File "<frozen importlib._bootstrap_external>", line 906, in create_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
ImportError: DLL load failed: The specified module could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", l
ine 41, in <module>
    from tensorflow.python.pywrap_tensorflow_internal import *
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 21, in <module>
    _pywrap_tensorflow_internal = swig_import_helper()
  File "C:\Python35\lib\site-packages\tensorflow\python\pywrap_tensorflow_intern
al.py", line 20, in swig_import_helper
    return importlib.import_module('_pywrap_tensorflow_internal')
  File "C:\Python35\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named '_pywrap_tensorflow_internal'


Failed to load the native TensorFlow runtime.

See https://www.tensorflow.org/install/install_sources#common_installation_probl
ems

for some common reasons and solutions.  Include the entire stack trace
above this error message when asking for help.
>>>

ich verwende Python 3.5.2 64bit. Ich weiß nicht wirklich, warum der Importprozess einen Fehler auslöst. Bitte helfen Sie mir, Gurus

danke und beste Grüße