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Powershell offline WU check
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| <# | |
| This script performs the 'search' phase of a Windows Update, using the standard WUA API. | |
| It does not download or install updates. | |
| Sole purpose of this script is to find out how long it takes to download the required cabfile, | |
| then process it against a live system and return the list of updates available for that system. | |
| #> | |
| function DownloadFile { | |
| param ( | |
| [Parameter(Mandatory=$true,Position=0)] $url, | |
| [Parameter(Mandatory=$true,Position=1)] $file | |
| ) | |
| $webclient = New-Object System.Net.WebClient | |
| $webclient.DownloadFile($url, $file) | |
| } | |
| function OfflineWUCheck { | |
| param ([Parameter(Mandatory=$true,Position=0)] $file) | |
| #using WU API, as documented at https://goo.gl/E1FKVR | |
| #get an updateservicemanager interface, https://goo.gl/bltX5q | |
| #then register our downloaded wsusscn2.cab as an update service, https://goo.gl/g00yVA | |
| $UpdateServiceManager = New-Object -ComObject 'Microsoft.Update.ServiceManager' | |
| $UpdateService = $UpdateServiceManager.AddScanPackageService("wsusscn2 file", $file) | |
| #Setup a searcher, have it use the newly registered updateservice | |
| $Searcher = New-Object -ComObject Microsoft.Update.Searcher | |
| $Searcher.ServerSelection = 3 | |
| $Searcher.ServiceID = $UpdateService.ServiceID | |
| Write-Host "Will search $($UpdateService.Name), $($UpdateService.ServiceID)" | |
| Write-Host "Beginning search using $($Searcher.ServiceID) $($Searcher.Name)" | |
| #$SearchResult = $UpdateSearcher.Search("IsInstalled=0 and Type='Software' and IsHidden=0") | |
| $SearchResult = $Searcher.Search("IsInstalled=0 and IsHidden=0") | |
| $Updates = $SearchResult.Updates | |
| Write-Host "$($Updates.Count) outstanding updates" | |
| if ($Updates.Count -ne 0){ | |
| foreach ($Update in $Updates) { | |
| $dlsize = $($Update.MaxDownloadSize)/1MB | |
| $dlsize = "{0:N1}" -f $dlsize | |
| Write-host "$($Update.KBArticleIDs), $($Update.MSRCSeverity), $dlsize MB" | |
| } | |
| } | |
| } | |
| #--- script start | |
| $url = "http://go.microsoft.com/fwlink/p/?LinkID=74689" | |
| $file = "c:\users\user\downloads\Wsusscn2.cab" | |
| $wuengine = (get-item $env:windir\system32\wuaueng.dll) | |
| $wua = $wuengine.VersionInfo.ProductVersion | |
| Write-Host "WU engine version: $wua" | |
| $dltime = Measure-Command {DownloadFile -url $url -file $file} | |
| $sig = Get-AuthenticodeSignature -FilePath $file | |
| if ($sig.Status -eq "Valid") { | |
| Write-Host "Downloaded $file with valid signature in $($dltime.seconds) seconds" | |
| Write-Host "Beginning offline WU check " | |
| $checktime = Measure-command {OfflineWUCheck -file $file} | |
| Write-Host "Offline WU check completed in $($checktime.Minutes) minutes." | |
| } |
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