Revisar enllaços Excel

$excel = New-Object -comObject Excel.Application
$excel.Visible = $false
$excel.DisplayAlerts = $false

foreach ($file in Get-ChildItem -recurse -force -Path "C:\SGPRL\*.xls?") {
	Write-Output "Explorant $($file.FullName) ..." >> C:\SGPRL\enllacos.txt
    $workbook = $excel.Workbooks.Open($file.FullName)    
    foreach ($sheet in $workbook.Sheets) {                    
        foreach ($cell in $sheet.Hyperlinks) {
#            $cell.Address = $cell.Address -ireplace $oldname, $newname                        
			if ($cell.Address.Contains("128.128") 
			|| $cell.Address.Contains("estacio68") 
			|| $cell.Address.Contains("ESTACIO68"))
			{
			  Write-Output "ENLLAÇ -> $($sheet.Name) $($cell.Address)" >> C:\SGPRL\enllacos.txt
			}
        }             
    }
#    $workbook.Save()
    $workbook.Close()
}
$excel.quit()    

[System.Runtime.Interopservices.Marshal]::ReleaseComObject($workbook)
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($excel)
[System.GC]::Collect() 
[System.GC]::WaitForPendingFinalizers()