Finding Installed Updates (and searching for missing) (Part 3)

When you want to examine installed updates on your machine, rather than searching for updates online and then comparing the installation status with your locally installed updates, a much faster approach queries the local update history.

The code below returns all updates present on your machine. It does not need an online connection.

#requires -Version 2.0
$Session = New-Object -ComObject "Microsoft.Update.Session"
$Searcher = $Session.CreateUpdateSearcher()
$historyCount = $Searcher.GetTotalHistoryCount()

$status = @{
    Name="Operation"
    Expression= {
        switch($_.operation)
        {
            1 {"Installation"}
            2 {"Uninstallation"}
            3 {"Other"}
        }
    }
}
$Searcher.QueryHistory(0, $historyCount) | 
Select-Object Title, Description, Date, $status |
Out-GridView

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