$localtime = 9 # UTF+$localtime
$objSession = new-object -com "Microsoft.Update.Session"
$objSearcher = $objSession.CreateupdateSearcher()
$intCount = $objSearcher.GetTotalHistoryCount()
$colHistory = $objSearcher.QueryHistory(0, $intCount)
$wustatus = 0
$additionalmsg = ""
$lastwudate = Get-Date	#localtime
if ($intCount -gt 0) {
  $lastwudate = ($colHistory[0].Date).AddHours($localtime)
  if (((Get-Date) - $lastwudate).Days -gt 30) {
    $wustatus = 1
    $additionalmsg = "[Warning: this system has not been updated for more than 30 days.]"
  }
}

foreach ($objHistory in $colHistory)
{
  $wudate = ($objHistory.Date).AddHours($localtime)
  if (($lastwudate - $wudate).Days -lt 7) {
  #if ((get-date($wudate) -Format "yyyyMMdd") -eq (get-date($lastwudate) -Format "yyyyMMdd")) {
    if ($objHistory.HResult -eq 0) {
      Write-Host ($wudate.ToString("yyyy/MM/dd hh:mm,")) $objHistory.Title ", Success"
    } elseif ($objHistory.HResult -eq -2145116140) {
      Write-Host ($wudate.ToString("yyyy/MM/dd hh:mm,")) $objHistory.Title ", Success (pending reboot)"
      $additionalmsg = "[Warning: this system is pending reboot.]"
    } else {
      Write-Host ($wudate.ToString("yyyy/MM/dd hh:mm,")) $objHistory.Title ", Failed (error:"$objHistory.HResult.ToString("X8")")"
      $wustatus = 1
    }
  }
}

Write-Host ""
Write-Host $additionalmsg
exit $wustatus