title: gitlab-runner: prepare environment failed to start process pwsh in windows
body: <p>On a new WIN10 machine after installing gitlab-runner with shell executor(i.e powershell) and starting a CI build throws following error:</p>
  <pre><code>Preparing environment
  ERROR: Job failed (system failure): prepare environment: failed to start process: exec: &quot;pwsh&quot;: executable file not found in %PATH%. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information
  </code></pre>