Summary: Learn to unload all non-Microsoft Windows PowerShell modules.

 Windows PowerShell is acting funny and I want to unload all modules that are not written by Microsoft.
          How can I easily do this?

 Use Get-Module to find all loaded modules, use the Where-Object cmdlet to filter for authors
          that do not match Microsoft, and then pipe the results to the Remove-Module cmdlet:

Get-Module | where Author -notmatch 'microsoft' | Remove-Module