A quick powershell function to use Robocopy to delete a full directory.

RoboDelete.ps1

function RoboDelete{
	param (
		$Path
    )

    ##-- generate a randomly named folder --##
    $randomString = -join ((48..57) + (97..122) | Get-Random -Count 32 | % {[char]$_})

    ##-- make the empty directory --##
    New-Item -ItemType Directory -Path $randomString -Verbose
    $emptyDirectory = Get-Item -Path $randomString -Force -Verbose
    $emptyDirectory.Attributes = 'Hidden'

    ##-- robocopy delete the directory --##
    Robocopy.exe $randomString $Path /MIR /MT:128

    ##-- delete the empty directory --##
    Remove-Item -Path $randomString -Force -Verbose -Recurse

    ##-- delete the now empty directory we were deleting --##
    Remove-Item -Path $Path -Force -Verbose -Recurse

}