我用conda安装了graphviz，然后在使用jupyter笔记本时，导入matplotlib时出现以下错误
ImportError: DLL load failed: %1 is not a valid Win32 application for Python Matplotlib
所以，我卸载了graphviz和matplotlib，重新安装了matplotlib，现在我得到了
matplotlib ImportError: DLL load failed: The specified module could not be found.
Python 2.7.11 |Anaconda custom (64-bit)| (default, Feb 16 2016, 09:58:36) [MSC v.1500 64 bit (AMD64)] on win32
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>>> import matplotlib
>>>
这是我的anaconda环境
platform : win-64
conda version : 4.1.11
conda-env version : 2.5.2
conda-build version : 1.21.3
python version : 2.7.11.final.0
requests version : 2.9.1
root environment : C:\Anaconda3 (writable)
default environment : C:\Anaconda3
envs directories : C:\Anaconda3\envs
package cache : C:\Anaconda3\pkgs
channel URLs : https://repo.continuum.io/pkgs/free/win-64/
https://repo.continuum.io/pkgs/free/noarch/
https://repo.continuum.io/pkgs/pro/win-64/
https://repo.continuum.io/pkgs/pro/noarch/
https://repo.continuum.io/pkgs/msys2/win-64/
https://repo.continuum.io/pkgs/msys2/noarch/
config file : None
offline mode : False
is foreign system : False
在我去修理整个conda和jupyter之前，有什么我应该尝试的吗？我宁愿避免这种情况。