I have a Mid-2010 13" MacBook Pro. Today, I updated it to OS 10.7.3 (from 10.7.2) through System Update. After the update, I have not been able to get into my computer at all. It will bong, go to the Apple logo, and then the spinning gear will spin forever. It's been doing it for two hours now, and I have tried turning it on and off and everything to no avail. I even let the battery run out, and still noting. I tried reinstalling Lion, but it says that it's verifying with Apple and then it gets stuck there. I have not been able to figure this out, and it's extremely frustrating. Any help here?