I had a Software Update Error message come up on the main display yesterday. I pressed the "OK" button and this cleared . . . for a few seconds. Then the message reappeared, and no matter how many times I pressed OK, I could not get it to clear. As I was passing a Toyota Dealer, I stopped in and spoke to one of the Service staff. They weren't too helpful, and all I could get out of them was that the car needed to come in for diagnosis. To cut a long story short, I managed to get this fixed