A scripting for rebooting system

strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate,(Shutdown)}!/" & strComputer & " ootcimv2")
Set colOperatingSystems = objWMIService.ExecQuery _
    ("Select * from Win32_OperatingSystem")
For Each objOperatingSystem in colOperatingSystems
    ObjOperatingSystem.Reboot()
Next