File encryption isn't one of the sexiest new features in OS X Mountain Lion. Notifications or Game Center probably take that title, but the new FileVault 2 can be very useful, especially for Mac users with sensitive information on their hard drives. Apple has updated its FileVault software to offer fast and easy encryption wherever your Finder goes.
To encrypt your disk completely, head into System Preferences under Security & Privacy and choose the FileVault menu. You will need to turn on FileVault there. You'll also need to make sure Recovery HD is installed on your hard drive. It should have been when you first installed Mountain Lion, but it may not have if something went wrong. Then you'll
