fatal error C1083: Cannot open include file: 'sys/un.h': No such file or directory

Question

I'm getting these errors while working with Spyder and Anaconda. My Python scripts only work with the Anaconda prompt and nothing else is working. This is the whole error:

_cffi_ext.c
anaconda3\lib\site-packages\zmq\backend\cffi\__pycache__\_cffi_ext.c(266): fatal error C1083: Cannot open include file: 'sys/un.h': No such file or directory

Traceback (most recent call last):
  File "C:\Users\harsh_c1pywie\anaconda3\Scripts\spyder-script.py", line 6, in <module>
    from spyder.app.start import main
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\spyder\app\start.py", line 22, in <module>
    import zmq
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\__init__.py", line 47, in <module>
    from zmq import backend
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\backend\__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
    raise value
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\backend\__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\backend\select.py", line 28, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "C:\Users\harsh_c1pywie\anaconda3\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: DLL load failed: The specified module could not be found.

I even uninstalled and installed zmq but the error persists.

Answer 1

Try

pip uninstall pyzmq 
pip install pyzmq

Answer 2

@CanciuCostin's answer is correct, but for doing something slightly different worked:

pip uninstall pyzmq 
pip install --user pyzmq

HTH.