Packer Template Windows Updates

packer.json

{
  "builders": [
    {
      "capture_container_name": "vsts-buildimagetask",
      "capture_name_prefix": "{{user `capture_name_prefix`}}",
      "client_id": "{{user `client_id`}}",
      "client_secret": "{{user `client_secret`}}",
      "communicator": "winrm",
      "image_offer": "{{user `image_offer`}}",
      "image_publisher": "{{user `image_publisher`}}",
      "image_sku": "{{user `image_sku`}}",
      "location": "{{user `location`}}",
      "object_id": "{{user `object_id`}}",
      "os_type": "Windows",
      "resource_group_name": "dsncontrol-{{user `environment`}}-RG",
      "storage_account": "dsncontrol{{user `environment` | lower}}",
      "subscription_id": "{{user `subscription_id`}}",
      "tenant_id": "{{user `tenant_id`}}",
      "type": "azure-arm",
      "vm_size": "Standard_D3_v2",
      "winrm_insecure": "true",
      "winrm_timeout": "15m",
      "winrm_use_ssl": "true",
      "winrm_username": "packer"
    }
  ],
  "post-processors": [],
  "provisioners": [
    {
      "type": "windows-shell",
      "inline": [
        "cmd /c \"if exist c:\\\\DeployTemp rd /s /q c:\\\\DeployTemp\"",
        "cmd /c \"mkdir c:\\\\DeployTemp\""
      ]
    },
    {
      "type": "windows-update"
    },
    {
      "type": "file",
      "source": "{{user `package_path`}}",
      "destination": "c:\\DeployTemp"
    },
    {
      "type": "powershell",
      "inline": [
        "cd \"C:\\DeployTemp\"",
        "C:\\DeployTemp\\{{user `script_imageconfig_path`}}"
      ]
    },
    {
      "type": "file",
      "source": "C:\\DeployTemp\\TestResults.xml",
      "destination": "{{user `defaultdir`}}\\TestResults.xml",
      "direction": "download"
    },
    {
      "type": "powershell",
      "inline": [
        "if( Test-Path $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml ){ rm $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml -Force}",
        "& $Env:SystemRoot\\System32\\Sysprep\\Sysprep.exe /oobe /generalize /quit /quiet"
      ]
    }
  ],
  "variables": {
    "capture_name_prefix": "",
    "client_id": "",
    "client_secret": "",
    "image_offer": "",
    "image_publisher": "",
    "image_sku": "",
    "location": "",
    "object_id": "",
    "package_name": "",
    "package_path": "",
    "script_imageconfig_path": "",
    "script_windowsupdate_path": "",
    "subscription_id": "",
    "tenant_id": "",
    "environment": ""
  }
}