How long does the install take? Is there any notification bar? I've downloaded the update, it prompted me with 'Would you like to install the following system software update......?" Giving me the option to install now or Install later. If I choose install now, it doesn't appear to do anything. The pop up just closes. And I stare at the screen like a goof ball expecting something to happen. This is full battery, plugged into a power out let. and I've rebooted. Any thoughts?