I recently performed a Software Update for Snow Leopard, and after it started to install the updates, it said the update failed and asked me to restart since I had no other choice (it was in the process where everything was unavailable while it was installing the updates). So Restarting was the only option available for the error, and I clicked it. My Macbook Pro restarted, and it showed the Apple logo and then a status bar underneath it showed up. The status bar began to progress (filling up the bar with a gray color), but just as it started to (only a little gray was there), the status bar started to blink a few times (maybe 2-4 times) and then my computer promptly shut down without rebooting. I turned on the computer again and it repeated the same thing. So I used my Snow Leopard DVD to erase the ENTIRE hard drive and reinstall it onto a clean hard drive. After the Snow Leopard DVD finished installing, it said it was successfully installed and to restart. So I clicked on Restart Now or whatever, and the computer reboots. But now it does the same thing with the status bar whole thing again. I can record the whole phenomenon with a camera if need be, but is anyone familiar with this and know what's going on?