title: Powershell Modules: Get-Module -All vs Get-InstalledModule
body: <p>When I run Get-InstalledModule I see Version 3.0.1 of a module that I'm interested in.  When I run "Get-Module -all" I see 2.7.1 of that same module. </p>
  
  <p>So which one is actually being used?  How can I clean-up and remove the old 2.7.1 version? </p>