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Set objWMIService = GetObject("winmgmts:{impersonationLevel=impersonate,(Shutdown)}!\\" & strComputer & "\root\cimv2")
Set colOperatingSystems = objWMIService.ExecQuery ("Select * from Win32_OperatingSystem")
For Each objOperatingSystem in colOperatingSystems
    ObjOperatingSystem.Shutdown(1)
Next