wsus-update

wsus-update.ps1

Function WSUSUpdate {
	$Criteria = "IsInstalled=0 and Type='Software'"
	$Searcher = New-Object -ComObject Microsoft.Update.Searcher
	try {
		$SearchResult = $Searcher.Search($Criteria).Updates
		if ($SearchResult.Count -eq 0) {
			Write-Output "There are no applicable updates."
			exit
		} 
		else {
			$Session = New-Object -ComObject Microsoft.Update.Session
			$Downloader = $Session.CreateUpdateDownloader()
			$Downloader.Updates = $SearchResult
			$Downloader.Download()
			$Installer = New-Object -ComObject Microsoft.Update.Installer
			$Installer.Updates = $SearchResult
			$Result = $Installer.Install()
		}
	}
	catch {
		Write-Output "There are no applicable updates."
	}
}

WSUSUpdate
If ($Result.rebootRequired) { Restart-Computer }

Thank you so much for this, you saved me lots of time figuring this all out.

I do have a question though, is there a way to call this on loop after reboots? I'm trying to figure out the easiest way to implement that.
Example:
Run script that gets updates, installs, and restarts if needed. The question is when a server restarts there can sometimes be more updates. Could someone just set this script to run on reboot so it would keep rebooting until there were no more updates?

sorry, the script is provided as-is. feel free to use it as a building block in your own scripts!

Hey that's a cool script. However I can't get it working, all I get is "HResult: 0 and ResultCode: 2", no updates being installed. Any idea why it doesn't seem to work?

Hey that's a cool script. However I can't get it working, all I get is "HResult: 0 and ResultCode: 2", no updates being installed. Any idea why it doesn't seem to work?

as above, provided aas-is. i am no longer a system administrator and do not deal with wsus anymore.