Start/Stop windows service dependent on wmi

[Pakmarshal]

Hi,
I have developed a windows service which records the applications (processes) that runs on the machine.

To get the process start trigger i have used wmi.

 Obj_ManagementStartWatcher = New ManagementEventWatcher("Select * From Win32_ProcessStartTrace")
  AddHandler mObj_ManagementStartWatcher.EventArrived, AddressOf Proces_Arrived
   Obj_ManagementStartWatcher.Start()

what I have noticed that if my machine RAM is almost full. and at that time if i stop my service , then copy same exe (service exe) and paste it on the same location and start it again.
My service stop recieve the triggers from wmi.

Moreover, in that condition if i try to restart wmi service it does not restarts as well.

The behaviour continues till i restart my machine.

What idea or suggestion how can I avoid this malfunctioning.

Thanks and Regards,
Maverick.