anchor.diff:  del /F "%PARALLELS_ISO_PATH"
   goto :exit0
   
  +::::::::::::
  +:hyperv
  +::::::::::::
  +for /F "usebackq tokens=3,4,5" %%i in (`REG query "hklm\software\microsoft\windows NT\CurrentVersion" /v ProductName`) do set GUEST_OS=%%i %%j %%k
  +
  +set GUEST_OS
  +
  +if "%GUEST_OS%" == "Windows Server 2016" goto :exit0
  +
  +::First, download the appropriate Windows Update CAB file from here: https://support.microsoft.com/en-us/kb/3063109
  +::  Windows 8.1: http://www.microsoft.com/downloads/details.aspx?familyid=cd142c42-204a-4566-b767-795e3409b135
  +::  Windows 8.1: http://www.microsoft.com/downloads/details.aspx?familyid=3a5a9015-c121-44dd-ad2e-962f66532da7
  +::  Windows Server 2012 R2: http://www.microsoft.com/downloads/details.aspx?familyid=a7704851-70bb-46c1-96d2-1b6f7ca226af
  +::  Windows Server 2012: http://www.microsoft.com/downloads/details.aspx?familyid=185812c8-8eb5-43c8-8505-70a262f4277d
  +::  Windows 7: http://www.microsoft.com/downloads/details.aspx?familyid=54c62651-0fc9-4642-ad12-404b3356825e
  +::  Windows 7: http://www.microsoft.com/downloads/details.aspx?familyid=c84f2899-d997-42af-bd5d-cb97086e3b09
  +::  Windows Server 2008 R2: http://www.microsoft.com/downloads/details.aspx?familyid=2dd45bd8-6bcd-47aa-8322-3e10b52b1f1f
  +::Open up Windows Powershell with elevated privileges.
  +::Set the correct path to the CAB file you’ve downloaded. For example:
  +::  $integrationServicesCabPath="C:\Downloads\windows6.2-hypervintegrationservices-x86.cab"
  +::Install the patch using the following command:
  +::  Add-WindowsPackage -Online -PackagePath $integrationServicesCabPath
  +
  +goto :exit0
  +
   :exit0
   @ver>nul
   @goto :exit
  
positive.code: @setlocal EnableDelayedExpansion EnableExtensions
  @for %%i in (a:\_packer_config*.cmd) do @call "%%~i"
  @if defined PACKER_DEBUG (@echo on) else (@echo off)
  
negative.code: if not errorlevel 1 goto virtualbox
  echo "%PACKER_BUILDER_TYPE%" | findstr /i "parallels" >nul
  if not errorlevel 1 goto parallels
  echo "%PACKER_BUILDER_TYPE%" | findstr /i "hyperv" >nul
  if not errorlevel 1 goto hyperv
  echo ==^> ERROR: Unknown PACKER_BUILDER_TYPE: "%PACKER_BUILDER_TYPE%"
  pushd .
  goto exit1
  