title: Corrupted conda cannot to channel
body: <p>My conda has been corrupted by some reasons....
  When I try to update conda or to install a package this, 
  I have this message :</p>
  
  <pre><code>conda update conda
  Error: HTTPError: 403 Forbidden http://repo.continuum.io/pkgs/pro/win-64/
  </code></pre>
  
  <p>My config of conda  is:</p>
  
  <pre><code>C:\Windows\system32&gt;conda info
  Current conda install:
  
               platform : win-64
          conda version : 3.2.0a1
         python version : 2.7.12.final.0
       root environment : G:\_dev\anaconda27  (writable)
    default environment : G:\_dev\anaconda27
       envs directories : G:\_dev\anaconda27\envs
          package cache : G:\_dev\anaconda27\pkgs
           channel URLs : http://repo.continuum.io/pkgs/free/win-64/
                          http://repo.continuum.io/pkgs/pro/win-64/
            config file : None
      is foreign system : False
  
  
  C:\Windows\system32&gt;conda info -a
  Current conda install:
  
               platform : win-64
          conda version : 3.2.0a1
         python version : 2.7.12.final.0
       root environment : G:\_dev\anaconda27  (writable)
    default environment : G:\_dev\anaconda27
       envs directories : G:\_dev\anaconda27\envs
          package cache : G:\_dev\anaconda27\pkgs
           channel URLs : http://repo.continuum.io/pkgs/free/win-64/
                          http://repo.continuum.io/pkgs/pro/win-64/
            config file : None
      is foreign system : False
  
  # conda environments:
  #
  root                  *  G:\_dev\anaconda27
  
  sys.version: 2.7.12 |Anaconda 4.2.0 (64-bit)| (defaul...
  sys.prefix: G:\_dev\anaconda27
  sys.executable: G:\_dev\anaconda27\python.exe
  conda location: G:\_dev\anaconda27\lib\site-packages\conda
  conda-build: G:\_dev\anaconda27\Scripts\conda-build.exe
  conda-convert: G:\_dev\anaconda27\Scripts\conda-convert.exe
  conda-develop: G:\_dev\anaconda27\Scripts\conda-develop.exe
  conda-index: G:\_dev\anaconda27\Scripts\conda-index.exe
  conda-inspect: G:\_dev\anaconda27\Scripts\conda-inspect.exe
  conda-metapackage: G:\_dev\anaconda27\Scripts\conda-metapackage.exe
  conda-render: G:\_dev\anaconda27\Scripts\conda-render.exe
  conda-server: G:\_dev\anaconda27\Scripts\conda-server.exe
  conda-sign: G:\_dev\anaconda27\Scripts\conda-sign.exe
  conda-skeleton: G:\_dev\anaconda27\Scripts\conda-skeleton.exe
  
  CIO_TEST: &lt;not set&gt;
  CONDA_DEFAULT_ENV: &lt;not set&gt;
  CONDA_ENVS_PATH: &lt;not set&gt;
  PATH: G:\_dev\anaconda27\Library\bin;C:\Program Files\Microsoft MPI\Bin\;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Shield;G:\_dev\anaconda27;G:\_dev\anaconda27\Scripts;G:\_dev\anaconda27\Library\bin;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;G:\app\emeditor;G:\_dev\googlesdk\google-cloud-sdk\bin
  PYTHONPATH: &lt;not set&gt;
  
  License directories:
      C:\Users\aa\.continuum
      C:\Users\aa\AppData\Roaming\Continuum
      G:\_dev\anaconda27\licenses
  License files (license*.txt):
  Package/feature end dates:
  </code></pre>
  
  <p>How to repair a corrupted conda ?
  Can I modify some files manually ?</p>