title: Jenkins slave is not able to access powershell modules
body: <p>There is a Jenkins node running at Windows Server 2012 R2 host.<br>
  There is a build job with "Windows PowerShell" step and command </p>
  
  <pre><code>Import-Module -Name:'WebAdministration'
  </code></pre>
  
  <p>Job is failing with error </p>
  
  <blockquote>
    <p>Import-Module : The specified module 'WebAdministration' was not loaded because no valid module file was found in any module directory.</p>
  </blockquote>
  
  <p>If I'm logging in as user which is running that node then manual execution of<br>
  <code>Import-Module -Name:'WebAdministration'</code> is fine.<br>
    The same job after manual module import will work for some time and then it starts failing again.</p>
  
  <p>Could anyone give a tip what could be wrong?</p>