It's Volume serial number and yes, it's simpler to get it with WSH if it's available. For HD serial number take a look at A DLL to tell your the hard disk Serial No File #9952. I didn't use it so I don't know how relable it is.

>as i understand the serial number is a software number assigned by the OS so it will not be equal to the phisical numbe, any way here is a simpler solution.
>
>PUBLIC idDisco
>oFS=CreateObject('scripting.filesystemobject')
>idDisco = oFS.Drives('c').SerialNumber
>