There is a black box in the lower right on the screen that says, "A new software update is available. Would you like to update now?" Choices are Show Details, Update Now, or Update Later. Update Now is highlighted, but it won't actually let me select anything on this menu. Roku is fully operational behind this stupid overlay box that will not go away. I tried to power TV off and on. I've tried going to Settings and updating manually, which worked successfully, but the box is still there. It seems to be part of the black background since I can barely see the picture behind the box.