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I'm running this script script (as discussed here):

$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$Searcher.Search("IsInstalled=1").Updates | ft -a Date,Title

However, the Search() method takes up to 10 minutes on some of the machines I'm testing on!

  • Why is this so slow? The list in Control Panel -> Programs and Features -> Installed Updates only takes a few seconds.
  • Can I make this faster? I'm only looking to see if one particular update is in the list.
  • What format is the "IsInstalled=1" query in? If I make a mistake, Search() returns all updates, which isn't very helpful. Edit: Documentation is here - IUpdateSearcher::Search method
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