function Join-HJLaw
{
	param(
		[string]$DeviceName
	)
    
	if (-not $DeviceName -eq "")
	{
		Rename-Computer -NewName $DeviceName
	}
	$ppkg = $false
	Get-ProvisioningPackage -AllInstalledPackages | ForEach-Object {
		if($_.PackagePath -like "*HJLaw*")
		{
			if ($_.IsInstalled)
			{
				$ppkg = $true
			}
		}
	}
	if (-not $ppkg)
	{
		$registryPath = "HKLM:\SOFTWARE\Microsoft\Enrollments"
		$subKeys = Get-ChildItem -Path $registryPath
		foreach ($subKey in $subKeys)
		{
			Remove-Item -Path "$registryPath\$($subKey.PSChildName)" -Recurse -Force
		}
		dsregcmd /leave
		Uninstall-ProvisioningPackage -AllInstalledPackages
        
		Install-ProvisioningPackage -PackagePath '.\HJLaw.ppkg' -QuietInstall -Force
		dsregcmd /status
	}
}