title: Lunching Spyder gives Bad address, completely fresh environment
body: <p>I cant get spyder to run.
  I do conda create -n somename python=3.8.5 spyder=4
  Or alternatively python=3.7.5 and spyder without version numbers.
  I have also tried the simple way and create a new environemtn via anaconda navigator.</p>
  <p>In all cases, I get the below error as aoson as i run spyder.
  I do have other environments on my pc and they rund fine.
  What could be going on here?</p>
  <p>Bad address (C:\ci\zeromq_1602704446950\work\src\epoll.cpp:100)
  Bad address (C:\ci\zeromq_1602704446950\work\src\epoll.cpp:100)
  [7432:1424:1219/110906.333:ERROR:broker_win.cc(59)] Error reading broker pipe: The pipe has been ended. (0x6D)
  [20456:7284:1219/110906.333:ERROR:broker_win.cc(59)] Error reading broker pipe: The pipe has been ended. (0x6D)</p>