So, I've noticed a weird behavior couple of times with my new SP3. After booting from being shutdown, when launching IE immediately from the start screen, the tablet becomes unresponsive. Can't close IE or bring up the charm bar. The power button does respond so I can push it and the screen goes black. But when I wake it up, screen is still blank and nothing will respond. I have to shut it down and reboot to get it working. Anyone else noticed this type of behavior?