Hi I’m trying to play with windows updates with PowerShell script, the script works fine but before results it through parsing error.

my script

$Session = New-Object -ComObject Microsoft.Update.Session            
$Searcher = $Session.CreateUpdateSearcher()            
$HistoryCount = $Searcher.GetTotalHistoryCount()            
# http://msdn.microsoft.com/en-us/library/windows/desktop/aa386532%28v=vs.85%29.aspx            
$Searcher.QueryHistory(0,$HistoryCount) | ForEach-Object -Process {            
    $Title = $null            
    if($_.Title -match "\(KB\d{6,7}\)"){            
        # Split returns an array of strings            
        $Title = ($_.Title -split '.*\((?KB\d{6,7})\)')[1]            
    }else{            
        $Title = $_.Title            
    }            
    # http://msdn.microsoft.com/en-us/library/windows/desktop/aa387095%28v=vs.85%29.aspx            
    $Result = $null            
    Switch ($_.ResultCode)            
    {            
        0 { $Result="NotStarted"}            
        1 { $Result="InProgress" }            
        2 { $Result="Succeeded" }            
        3 { $Result="SucceededWithErrors" }            
        4 { $Result="Failed" }            
        5 { $Result="Aborted" }            
        default { $Result = $_ }            
    }            
    New-Object -TypeName PSObject -Property @{            
        InstalledOn = Get-Date -Date $_.Date;            
        Title = $Title;            
        Name = $_.Title;            
        Status = $Result            
    }            
            
} | Sort-Object -Descending:$true -Property nInstalledO |             
Select-Object -Property * -ExcludeProperty Name | Format-Table -AutoSize -Wrap

above script works fine but before results it shows some parsing error at line

error:

parsing ".*\((?KB\d{6,7})\)" - Unrecognized grouping construct.
At B:\Clients\SirAhmad\check-updates-history.ps1:9 char:9
+         $Title = ($_.Title -split '.*\((?KB\d{6,7})\)')[1]
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException

at line

$Title = ($_.Title -split '.*\((?KB\d{6,7})\)')[1]

Looks regx issues.

Can someone help me out to indicate what is the issue with regix?