WinWaitClose, ahk_exe taskmgr.exe
loop
   RunWait, taskmgr.exe

#Persistent
PM := new ProcessMonitoring(, Func("OnTaskmgrClose"), "taskmgr.exe")

OnTaskmgrClose(name, PID, cmd) {
   Run, taskmgr.exe
}

class ProcessMonitoring
{
   __New(UserFuncOnCreate := "", UserFuncOnDelete := "", singleProcess := "") {
      command := "Within 1 Where TargetInstance ISA 'Win32_Process'"
               . (singleProcess ? " And TargetInstance.Name = '" . singleProcess . "'" : "")
      this.WMI := ComObjGet("winmgmts:")
      if UserFuncOnCreate {
         this.createSink := ComObjCreate("WbemScripting.SWbemSink")
         ComObjConnect( this.createSink, new this.EventSink(UserFuncOnCreate) )
         this.WMI.ExecNotificationQueryAsync(this.createSink, "select * from __InstanceCreationEvent " . command)
      }
      if UserFuncOnDelete {
         this.deleteSink := ComObjCreate("WbemScripting.SWbemSink")
         ComObjConnect( this.deleteSink, new this.EventSink(UserFuncOnDelete) )
         this.WMI.ExecNotificationQueryAsync(this.deleteSink, "select * from __InstanceDeletionEvent " . command)
      }
   }
   
   class EventSink
   {
      __New(UserFunc) {
         this.UserFunc := UserFunc
      }
      
      OnObjectReady(params*) {
         Process := params[1].TargetInstance
         name := Process.Name
         PID := Process.ProcessID
         cmd := Process.CommandLine
         timer := this.UserFunc.Bind(name, PID, cmd)
         SetTimer, % timer, -10
      }
   }
}