WSUS Konfiguration - Updates sofort laden und installieren wenn VM eingeschaltet wird

$ServiceName = "wuauserv"  
$count = 1
$maxcount = 10
$sleeptime = 30

$Criteria = "IsInstalled=0 and Type='Software'"  

$year = Get-Date -UFormat %Y
$month = Get-Date -UFormat %m
$day = Get-Date -UFormat %d

$sLogPath = "C:\LogFiles"  
$sLogName = "WSUSrun" + ".log"  
$sLogFile = $sLogPath + "\" + $sLogName  

#*****************************************************************************
Function LogWrite
{
	Param ([string]$sLogString)
	
	$time = Get-Date -UFormat %T
	$sLogString = $day + "." + $month + "." + $year + " - " + $time + " * " + $sLogString  
	write-host $sLogString
	Add-content $sLogFile -value $sLogString
}
#*****************************************************************************

$string = "--- START ---"  
LogWrite $string

$arrService = Get-Service -Name $ServiceName
if ($arrService.Status -ne "Running") {  
    $string = "service " + $ServiceName + " not running, starting service..."  
    LogWrite $string
    Start-Service $ServiceName
}

Do {
    $string = "checking service, attempt " + $count  
    LogWrite $string
    $arrService = Get-Service -Name $ServiceName
    if ($arrService.Status -ne "Running")  
    {
        $string = "service not running, sleeping " + $sleeptime + " seconds..."  
        LogWrite $string
        Start-Sleep $sleeptime
        $count++
    }
    else
    {
        $string = "service running, final sleep for " + $sleeptime + " seconds..."  
        LogWrite $string
        Start-Sleep $sleeptime
        break
    }
} while ($count -le $maxcount)

If ($count -gt $maxcount) {
    $string = "service not running, exitcode 1"  
    LogWrite $string
    Exit 1
}

LogWrite "Creating update session"  
$Session = New-Object -com "Microsoft.Update.Session"  

LogWrite "Searching for updates..."  
$Search = $Session.CreateUpdateSearcher()
$SearchResult = $Search.Search($Criteria)
$string = "There are " + $SearchResult.Updates.Count + " updates available"  
LogWrite $string

$AvailableUpdates = $SearchResult.Updates 

if($AvailableUpdates.Count -lt 1) {
    LogWrite "No results meet your criteria, disabling scheduled task."  
    Disable-ScheduledTask -TaskName "WSUSrun"  
    exit 0
}

LogWrite "Updates selected for installation"  
$AvailableUpdates | ForEach-Object {
    $string = "- " + $_.Title  
    LogWrite $string
    $_.Categories | ForEach-Object {
        $string = "  # category: " + $_.Name.ToString()  
        LogWrite $string
    }
}

LogWrite "Creating download selection"  
$DownloadCollection = New-Object -com "Microsoft.Update.UpdateColl"  

$AvailableUpdates | ForEach-Object {
    if ($_.InstallationBehavior.CanRequestUserInput -ne $TRUE) {
        $DownloadCollection.Add($_) | Out-Null
    }
}

LogWrite "Downloading updates..."  
$Downloader = $Session.CreateUpdateDownloader() 
$Downloader.Updates = $DownloadCollection 
$DownloadResult = $Downloader.Download() 
LogWrite "Download complete"   

LogWrite "Creating installation object"  
$InstallCollection = New-Object -com "Microsoft.Update.UpdateColl"  
$AvailableUpdates | ForEach-Object {
    if ($_.IsDownloaded) {
        $InstallCollection.Add($_) | Out-Null
    }
}

LogWrite "Installing updates..."  
$Installer = $Session.CreateUpdateInstaller()
$Installer.Updates = $InstallCollection
$InstallResult = $Installer.Install()
LogWrite "Installation complete"  

if ($InstallResult.RebootRequired) {
    LogWrite "Rebooting..."  
    Restart-Computer -Computer localhost -Force
}
else {
    LogWrite "No reboot required, scheduled task disabled"  
    Disable-ScheduledTask -TaskName "WSUSrun"  
	Invoke-Command { wuauclt.exe /detectnow /reportnow}
}

exit 0