執行新建環境報錯：
conda create -n xxx
錯誤：
Solving environment: failed
CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://repo.anaconda.com/pkgs/r/noarch/repodata.json.bz2>
Elapsed: -An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.If your current network has https://www.anaconda.com blocked, please file
a support request with your network engineering team.SSLError(MaxRetryError('HTTPSConnectionPool(host=\'repo.anaconda.com\', port=443): Max retries exceeded with url: /pkgs/r/noarch/repodata.json.bz2 (Caused by SSLError("Can\'t connect to HTTPS URL because the SSL module is not available."))'))
首先嚐試查看conda信息：
C:\Users>conda info
active environment : None
user config file : C:\Users\xxx\.condarc
populated config files :
conda version : 4.5.12
conda-build version : 3.17.6
python version : 3.7.1.final.0
base environment : C:\Users\xxx\AppData\Local\Continuum\anaconda3 (writable)
channel URLs : https://repo.anaconda.com/pkgs/main/win-64
https://repo.anaconda.com/pkgs/main/noarch
https://repo.anaconda.com/pkgs/free/win-64
https://repo.anaconda.com/pkgs/free/noarch
https://repo.anaconda.com/pkgs/r/win-64
https://repo.anaconda.com/pkgs/r/noarch
https://repo.anaconda.com/pkgs/pro/win-64
https://repo.anaconda.com/pkgs/pro/noarch
https://repo.anaconda.com/pkgs/msys2/win-64
https://repo.anaconda.com/pkgs/msys2/noarch
package cache : C:\Users\E0277957\AppData\Local\Continuum\anaconda3\pkgs
C:\Users\E0277957\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\E0277957\AppData\Local\Continuum\anaconda3\envs
C:\Users\E0277957\AppData\Local\conda\conda\envs
C:\Users\E0277957\.conda\envs
platform : win-64
user-agent : conda/4.5.12 requests/2.21.0 CPython/3.7.1 Windows/10 Windows/10.0.16299
administrator : False
netrc file : None
offline mode : False
可見conda已經安裝成功，base environment也是正確的 。
之後發現conda 32 bits可以正常運行，64bits 老版本可以正常運行。懷疑是ssl沒有更新。
於是重新安裝openssl。在https://slproweb.com/products/Win32OpenSSL.html下載最新版本安裝。問題解決。