Sensational! Listing Windows Updates with PowerShell.

$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$HistoryCount = $Searcher.GetTotalHistoryCount()
$Searcher.QueryHistory(1,$HistoryCount) | 
  Select-Object Date, Title, Description

The original is here: http://powershell.com/cs/blogs/tips/archive/2012/09/27/listing-windows-updates-with-powershell.aspx

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