strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")

Set colOperatingSystems = objWMIService.ExecQuery _
("Select * from Win32_OperatingSystem")

For Each objOperatingSystem in colOperatingSystems
Wscript.Echo objOperatingSystem.ServicePackMajorVersion _
& "." & objOperatingSystem.ServicePackMinorVersion
Next