anchor.diff:  )
   msiexec /qb /i C:\Windows\Temp\7z920-x64.msi
   
  +if "%PACKER_BUILDER_TYPE%" equ "vmware-iso" goto :vmware
  +if "%PACKER_BUILDER_TYPE%" equ "virtualbox-iso" goto :virtualbox
   if "%PACKER_BUILDER_TYPE%" equ "parallels-iso" goto :parallels
  -if "%PACKER_BUILDER_TYPE%" equ "virtualbox-iso" goto :virtualbox
  -if "%PACKER_BUILDER_TYPE%" equ "vmware-iso" goto :vmware
  -
  -rem default is vmware
  -rem rem goto :done
  +goto :done
   
   :vmware
   
  
positive.code: cmd /c ""C:\Program Files\7-Zip\7z.exe" x "C:\Windows\Temp\windows.iso" -oC:\Windows\Temp\VMWare"
  cmd /c C:\Windows\Temp\VMWare\setup.exe /S /v"/qn REBOOT=R\"
  
  goto :done
  
  :virtualbox
  
negative.code: )
  
  if not exist "C:\Windows\Temp\VBoxGuestAdditions.iso" (
      powershell -Command "(New-Object System.Net.WebClient).DownloadFile('http://download.virtualbox.org/virtualbox/5.1.20/VBoxGuestAdditions_5.1.20.iso', 'C:\Windows\Temp\VBoxGuestAdditions.iso')" <NUL
  )
  
  cmd /c ""C:\Program Files\7-Zip\7z.exe" x C:\Windows\Temp\VBoxGuestAdditions.iso -oC:\Windows\Temp\virtualbox"
  certutil -addstore -f "TrustedPublisher" C:\Windows\Temp\virtualbox\cert\vbox-sha256-r3.cer
  certutil -addstore -f "TrustedPublisher" C:\Windows\Temp\virtualbox\cert\vbox-sha256.cer
  certutil -addstore -f "TrustedPublisher" C:\Windows\Temp\virtualbox\cert\vbox-sha1.cer
  cmd /c C:\Windows\Temp\virtualbox\VBoxWindowsAdditions.exe /S
  rd /S /Q "C:\Windows\Temp\virtualbox"
  goto :done
  