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Windows Updates: 3 Installing Updates

Now we have discovered the updates we have available we can think about installing them.

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function install-update {

$session = New-Object -ComObject Microsoft.Update.Session
$searcher = $session.CreateUpdateSearcher()

$result = $searcher.Search("IsInstalled=0 and Type='Software' and ISHidden=0" )

if ($result.Updates.Count -eq 0) {
 
Write-Host "No updates to install"
}
else {
$result.Updates | select Title
}

$downloads = New-Object -ComObject Microsoft.Update.UpdateColl

foreach ($update in $result.Updates){
 
$downloads.Add($update
)
}
 

$downloader = $session.CreateUpdateDownLoader()
$downloader.Updates = 
$downloads
$downloader
.Download()

$installs = New-Object -ComObject Microsoft.Update.UpdateColl
foreach ($update in $result.
Updates){
 
if ($update.
IsDownloaded){
  
$installs.Add($update
)
 }
}

$installer = $session.CreateUpdateInstaller()
$installer.Updates = 
$installs
$installresult
 = $installer.Install()
$installresult

}

 

The function looks for non-hidden software updates that aren’t hidden.  At the moment I want some control over driver updates. If there are updates available they are added to a download collection and then downloaded.

The update collection returned from our original search is automatically updated with the fact the update is now downloaded.

We create an installer, add the updates to it and install.

The function is still a bit rough but it works and better still illustrates how the COM objects work.

Next jobs are to tidy up the functions and extend the functionality to remote machines!

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