title: Powershell doesn't open - error "Path cannot be the empty string or all whitespace"
body: <p>I'm simply trying to open Powershell on my server. It opens for about 5 seconds and then closes, not showing any error before it closes or anything. The only thing I can see is in the Windows Powershell Event Log is that it gives the following error:</p>
  
  <blockquote>
    <p>"Settings: Path cannot be the empty string or all whitespace."</p>
  </blockquote>
  
  <p>I'm running WMF 4, Server 2012 R2, Exchange Server 2016 (not that I think that has anything to do with it). Any other post I've seen when I google " Powershell Path cannot be the empty string or all whitespace" always seems to have to do with someone programming. I'm just trying to open powershell.</p>