If everything is working OK, I wouldn't worry too much about it. Remember that the Event Log records everything that goes on in your machine.
When I boot up there are always three red error signs come up a couple of minutes later telling me that there is an error on disk controller something or other. It's done this ever since I built the machine. I don't take any notice. Everything works OK so I ignore it.
If things were going wrong then, yes, I would take heed but not so far.