I have a white macbook. Today, I downloaded "handbrake" off their site. I didn't realized that it would use almost all of my processing power, so I tried to convert a DVD to mp4 while doing other things. that didn't work so i restarted the computer and did it again, this time having that be the sole program running. it worked beautifully. Then, when I tried to get the mp4 file to iTunes, my computer froze and so i restarted it, and tried again. My computer froze again, so i restarted it again. This time, my computer did not load the desktop or anything after the initial startup By initial startup i mean first the ping, grey screen with apple and loading gear, and then the loading bar on the next page. it does all this, and if im correct, it is now supposed to show me my dock/desktop and everything, which it does not, it is simply a blue screen which occasionally flashes. I've tried restarting the PRAM, running a hardware test, and repairing the permissions. After repairing the permisions, the blue screen does not flash but rather has a loading gear which does not stop spinning. What should i do? i have an appointment at the Genius bar, but im sure they are going to make me buy some stuff that wont actually work. Is there anyway to fix this without losing my memory? thank you for your help.