Jupiter notebook error in windows 64-bit

upgraded the python to 38, I tried re-installing pyzmq still same error

C:\Users\Mohan>jupyter notebook
Traceback (most recent call last):
File "c:\python38\lib\runpy.py", line 192, in run_module_as_main
return run_code(code, main_globals, None,
File "c:\python38\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "C:\Python38\Scripts\jupyter-notebook.EXE_main.py", line 5, in
File "c:\python38\lib\site-packages\notebook\notebookapp.py", line 47, in
from zmq.eventloop import ioloop
File "c:\python38\lib\site-packages\zmq_init.py", line 47, in
from zmq import backend
File "c:\python38\lib\site-packages\zmq\backend_init.py", line 40, in
reraise(*exc_info)
File "c:\python38\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
raise value
File "c:\python38\lib\site-packages\zmq\backend_init_.py", line 27, in
ns = select_backend(first)
File "c:\python38\lib\site-packages\zmq\backend\select.py", line 28, in select_backend
mod = import(name, fromlist=public_api)
File "c:\python38\lib\site-packages\zmq\backend\cython_init.py", line 6, in
from . import (constants, error, message, context,
ImportError: DLL load failed while importing error: The specified module could not be found.

Reproduce the Windows 64-bit startup failure with Python 3.8 using the jupyter notebook entry point. Start with notebook/notebookapp.py and the zmq/backend import path shown in the traceback, then verify that the notebook starts without the DLL load error.