[reflection.assembly]::LoadWithPartialName("Microsoft.UpdateServices.Administration") | out-null

if (!$wsus) {
        $wsus = [Microsoft.UpdateServices.Administration.AdminProxy]::GetUpdateServer();
}

$computerScope = new-object Microsoft.UpdateServices.Administration.ComputerTargetScope;
$computerScope.IncludedInstallationStates = [Microsoft.UpdateServices.Administration.UpdateInstallationStates]::InstalledPendingReboot;

$updateScope = new-object Microsoft.UpdateServices.Administration.UpdateScope;
$updateScope.IncludedInstallationStates = [Microsoft.UpdateServices.Administration.UpdateInstallationStates]::InstalledPendingReboot;

$computers = $wsus.GetComputerTargets($computerScope);

$computers | foreach-object {
                $_.FullDomainName | write-host ;
               
}  

$computerScope = new-object Microsoft.UpdateServices.Administration.ComputerTargetScope;
$collection = $wsus.GetComputerTargetGroupCollection();
$Idx = $collection.IndexOf("MyGroup");
if ($Idx -gt -1)
      $computerScope.ComputerTargetGroups.Add($collection.item[$Idx]);
$computerScope.IncludeSubgroups = true; 

$collection = $wsus.GetComputerTargetGroups(); 

[reflection.assembly]::LoadWithPartialName("Microsoft.UpdateServices.Administration") | out-null

$wsus = [Microsoft.UpdateServices.Administration.AdminProxy]::GetUpdateServer("WSUS1.Domain1.de",0);
$wsus1 = [Microsoft.UpdateServices.Administration.AdminProxy]::GetUpdateServer("WSUS2.Domain2.de",0)
$wsus2 = [Microsoft.UpdateServices.Administration.AdminProxy]::GetUpdateServer("WSUS3.Domain3.com",0)

Remove-Item W:\Something.txt
Remove-Item W:\Something1.txt
Start-Sleep -s 10
$file1 = "W:\Something.txt"
$file2 = "W:\Something1.txt"

$computerScope = new-object Microsoft.UpdateServices.Administration.ComputerTargetScope;
$computerScope.IncludedInstallationStates = [Microsoft.UpdateServices.Administration.UpdateInstallationStates]::InstalledPendingReboot;

$updateScope = new-object Microsoft.UpdateServices.Administration.UpdateScope;
$updateScope.IncludedInstallationStates = [Microsoft.UpdateServices.Administration.UpdateInstallationStates]::InstalledPendingReboot;


$collection1 = $wsus.GetComputerTargets($computerScope);
$collection2 = $wsus1.GetComputerTargets($computerScope);
$collection3 = $wsus2.GetComputerTargets($computerScope);


$computers=$collection1+$collection2+$collection3


#hier können Rechner definiert werden die vom Neustart ausgeschlossen werden sollen.

$computers | foreach-object {
	$_.FullDomainName | foreach-object 	{
		if ($_ -eq 'Server.Domain1'){
		}

		elseif ($_ -eq 'Server1.Domain1'){
		}

		elseif ($_ -eq Server2.Domain1'){
		}

		elseif ($_ -eq 'Server3.Domain1'){
		}

		elseif ($_ -eq 'Server4.Domain2'){
		}

		elseif ($_ -eq 'Server5.Domain1'){
		}

		elseif ($_ -eq 'Server6.Domain1'){
		}

		elseif ($_ -eq 'Server7.Domain1'){
		}

		elseif ($_ -eq 'Serverxyz.Domain1'){
		}

		else {


		#Dies sind also alle Rechner die einen Neustart benötigen und neugestartet werden dürfen!
		out-file -filepath $file1 -inputobject $_ -append -encoding default
		}
	}
}

#Sind die Rechner überhaupt erreichbar?
$file1 = get-content W:\something.txt
foreach ($Linie in $file1) {
	if ( Test-Connection $Linie -count 1 -quiet ){
				#ja sind Sie...
				#Hier stehen nun alle Online Rechner mit Reboot pending
				out-file -filepath W:\wsus\Clients_rebooted.txt -inputobject $Linie -append -encoding default
				#Reboot endlich :D
				restart-computer -computername $Linie -Force
	}

}

Start-Sleep -s 1800

# Sind die Rechner nach dem Reboot per Ping erreichbar?

$file2 = get-content W:\something1.txt
		foreach ($Linie2 in $file2) {
			if ( Test-Connection $Linie2 -count 1 -quiet ){

			# be happy... Everything is allright	:-)

			}

			else {
				# Mailbenachrichtigung im Fehlerfall
				function sendmail($body)
						{
						$SmtpClient = new-object system.net.mail.smtpClient
						$MailMessage = New-Object system.net.mail.mailmessage
						$SmtpClient.Host = "mail.Domain1.de"
						$mailmessage.from = "WSUS@Domain1.de"
						$mailmessage.To.add("edv@Domain1.de")
						$mailmessage.Subject = $Linie2 +' nach 30 min nicht online'
						$MailMessage.IsBodyHtml = $true
						$mailmessage.Body = $body
						$smtpclient.Send($mailmessage)
						}

						$body =  $Linie2 +' ist nicht via ping erreichbar. Bitte umgehend prüfen'
						sendmail $body
			}
		}