How to do it...

First, let's look at how you change the spool folder using the .NET Framework:

1. Load the System.Printing namespace and classes:

      Add-Type -AssemblyName System.Printing

1. Define the required permissions—that is, the ability to administrate the server:

      $Permissions = 
       [System.Printing.PrintSystemDesiredAccess]::
        AdministrateServer

1. Create a PrintServer object with the required permissions:

      $Ps = New-Object 
            -TypeName System.Printing.PrintServer `
                     -ArgumentList $Permissions

1. Update the default spool folder path:

      $Newpath = 'C:\Spool'
      $Ps.DefaultSpoolDirectory = $Newpath

1. Commit the change:

      $Ps.Commit()

1. Restart the Spooler to accept the new folder:

    Restart-Service -Name Spooler
  

1. Once the Spooler has restarted, view the results:

      New-Object -TypeName System.Printing.PrintServer |
          Format-Table -Property Name, 
            DefaultSpoolDirectory

Another way to set the Spooler directory is by directly editing the registry as follows:

1. First stop the Spooler service:

      Stop-Service -Name Spooler

1. Set the spool directory registry setting:

      PS C:\foo> $RPath    = 'HKLM:\SYSTEM\CurrentControlSet\Control\ +
                              Print\Printers'
      $Spooldir = 'C:\SpoolViaRegistry'
      Set-ItemProperty -Path $RPath `
                       -Name DefaultSpoolDirectory `
                       -Value 'C:\SpoolViaRegistry'

1. Restart the Spooler:

       Start-Service -Name Spooler

1. View the results:

       New-Object -TypeName System.Printing.PrintServer |
           Format-Table -Property Name, 
            DefaultSpoolDirectory