The other day, I was running software updates and the downloading process froze, while the rest of the computer did not. I quit updates, tried to restart, and haven't seen my desktop since. I am not able to login. In fact, I'm not able to get past that cute Apple logo/spinning time wheel screen. I've tried rebooting with the "OS X install disc-hold C" trick. This leads to a notification that I need to restart my computer. Restarting my computer and going through the same procedures, I come back to the restart message--an infinite cycle. Is there anything at this point that I can do on my own?