我已经安装了Anaconda，并且导航器不会从开始菜单中打开，也不会提示。但是，两者都只能通过cmd。但是，即使导航器将通过cmd打开，也不会打开任何软件包。修复？
我尝试了卸载和安装。我已经更新了conda，导航器，软件包，它仍然无法从导航器中打开任何应用程序，这是尝试打开Jupyter时的错误消息：
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in
from notebook.notebookapp import main
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\notebook\notebookapp.py", line 47, in
from zmq.eventloop import ioloop
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\__init__.py", line 47, in
from zmq import backend
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\backend\__init__.py", line 40, in
reraise(*exc_info)
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
raise value
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\backend\__init__.py", line 27, in
_ns = select_backend(first)
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\backend\select.py", line 28, in select_backend
mod = __import__(name, fromlist=public_api)
File "C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\backend\cython\__init__.py", line 6, in
from . import (constants, error, message, context,
ImportError: cannot import name 'constants' from 'zmq.backend.cython' (C:\Users\Ben\AppData\Roaming\Python\Python37\site-packages\zmq\backend\cython\__init__.py)
有人可以帮忙吗？