PowerShell script to scan to your desktop

scan.ps1

$deviceManager = new-object -ComObject WIA.DeviceManager
$device = $deviceManager.DeviceInfos.Item(1).Connect()
$wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}"
foreach ($item in $device.Items) {
    $image = $item.Transfer($wiaFormatPNG)
    if($image.FormatID -ne $wiaFormatPNG)
    {
        $imageProcess = new-object -ComObject WIA.ImageProcess
        $imageProcess.Filters.Add($imageProcess.FilterInfos.Item("Convert").FilterID)
        $imageProcess.Filters.Item(1).Properties.Item("FormatID").Value = $wiaFormatPNG
        $image = $imageProcess.Apply($image)
    }
    $i = 1
    while (test-path ("$env:userprofile\desktop\scan$i.png" ) ) { $i += 1 }
    $image.SaveFile("$env:userprofile\desktop\scan$i.png")
}