Param($PackageDir)
if ($PSBoundParameters.Count -ne 1)  { Write-host "Error: -PackageDir <path>" ;exit 1}
If ( -not (Test-Path $packagedir)) { Write-host "Error: -PackageDir <path> does not exist." ;exit 1}

$packages = (Get-ChildItem -Path $packagedir| where {$_.extension -eq ".msu"} | Sort Name | %{$_.FullName})

$success = $true
if ($packages.Count -gt 0){
  Write-Output "Installation of updates is starting... "
  foreach ($package in $packages){
    Start-Process wusa.exe -Wait -ArgumentList "$package /quiet /norestart"
    if (!($LASTEXITCODE -eq 0)) {
      $success = $false
      $package = "+ " + (Get-Item $package).Name + ": Failed"   
    } else {
      $package = "+ " + (Get-Item $package).Name  + ": Success"
    }
    Write-Output $package
  }
  Write-Output "Finished installing updates."
  if ($success) {
    Write-Output "Info: All updates were successfully installed."
  } else {
    Write-Output "Info: There are failed updates."
  }
} else {
  Write-Host "There are no updates (msu)."
  #Pause
  exit 0
}
if (Test-Path "HKLM:SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired") {
    Write-Output "Pending reboot. Press Enter to initiate reboot."
    #Pause
    Restart-Computer -Force

} else {
    Write-Output "No reboot is required."
    #Pause
}
exit 0