Start-Transcript -Path $env:Temp\$(Get-Date -Format "yyyyMMddHHmm")_winupdate_via_fog.log
Write-Host "--- Running Windows Update ---"
Write-Host "Searching for updates..."

$UpdateSession = New-Object -ComObject "Microsoft.Update.Session"
$UpdateSearcher = $UpdateSession.CreateupdateSearcher()
$SearchCriteria = "IsHidden=0 and IsInstalled=0"
$SearchResult = $UpdateSearcher.Search($Criteria)
Write-Host "List of applicable items on the machine:"

If ($SearchResult.Updates.Count -eq 0) {
  Write-Host "There are no applicable updates."
} Else {
  $DownloadReq = $False
  $i = 0

  ForEach ($Update in $SearchResult.Updates){
    $i++
    If ( $Update.IsDownloaded ) {
      Write-Host $i">" $Update.Title "(downloaded)"
    } Else {
      $DownloadReq = $true
      Write-Host $i">" $Update.Title "(not downloaded)"
    }
  }

  If ( $DownloadReq ) {
    Write-Host "Creating collection of updates to download..."
    $UpdatesToDownload = New-Object -ComObject "Microsoft.Update.UpdateColl"
    ForEach ($Update in $SearchResult.Updates){
      $UpdatesToDownload.Add($Update) | out-null
    }
    Write-Host "Downloading updates..."
    $Downloader = $UpdateSession.CreateUpdateDownloader() 
    $Downloader.Updates = $UpdatesToDownload
    $Downloader.Download()
    Write-Host "List of downloaded updates:"
    $i = 0
    ForEach ($Update in $SearchResult.Updates){
      $i++
      If ( $Update.IsDownloaded ) {
        Write-Host $i">" $Update.Title "(downloaded)"
      } Else {
        Write-Host $i">" $Update.Title "(not downloaded)"
      }
    }
  } Else {
    Write-Host "All updates are already downloaded."
  }

  $UpdatesToInstall = New-Object -ComObject "Microsoft.Update.UpdateColl"
  Write-Host "Creating collection of downloaded updates to install..." 
  ForEach ($Update in $SearchResult.Updates){
    If ( $Update.IsDownloaded ) {
      $UpdatesToInstall.Add($Update) | out-null
    }
  }
 
  If ( $UpdatesToInstall.Count -eq 0 ) {
    Write-Host "Not ready for installation."
  } Else {
    Write-Host "Installing" $UpdatesToInstall.Count "updates..."
    $Installer = $UpdateSession.CreateUpdateInstaller()
    $Installer.Updates = $UpdatesToInstall
    $InstallationResult = $Installer.Install()

    If ( $InstallationResult.ResultCode -eq 2 ) {
      Write-Host "All updates installed successfully."
    } Else {
      Write-Host "Some updates could not installed."
    }

    If ( $InstallationResult.RebootRequired ) {
      Write-Host "One or more updates are requiring reboot."
      #Write-Host "Reboot system now !!"
      #shutdown.exe /r /t 0
      # Write-Host "Shutdown system now !!"
      # shutdown.exe /s /t 0
    } Else {
      Write-Host "Finished. Reboot are not required."
    }

  }
}
Stop-Transcript