Getting Dell Asset tag through WMI

http://www.edugeek.net/forums/scripts/3227-find-dell-service-tag.html

This WMI call usually works for other brands as well.

Single command:

  wmic bios get serialnumber

or

  wmic /node:"remote-pc-name-here" bios get serialnumber

or

 wmic csproduct get vendor,name,identifyingnumber

Or in VBScript:
strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\.\root\cimv2")
Set colSMBIOS = objWMIService.ExecQuery ("Select * from Win32_SystemEnclosure")
For Each objSMBIOS in colSMBIOS
Wscript.Echo "Dell Service Tag: " & objSMBIOS.SerialNumber

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