Ryan got a used MacBook Pro, and he'd like to start over by erasing the disc. Leo says the good news is that with Apple, there's a recovery partition that will allow him to format the drive and reinstall the OS. He should reboot, and hold down the CMD-OPT-R. That'll do a clean install just like it came from the factory. Then he'll have to update it from there. Since Apple no longer charges for upgrades, it'll be easy to do it.