I just got my 13in MacBook Pro with Retina Display. I believe it`s the latest version of MacBook. I wanted to install Windows 7 into my MacBook. So my friend gave me an usb drive with iso file and installed it using BootCamp. Windows 7 seems to run pretty well, but when I turn on MacBook and press option key, there's 3 disks displaying - MacBook, Windows, and this thing called "Recovery 10.9". I don't know what this is for and whether this is bug or not. Because when I saw someone`s instructional video, this wash`t displayed. If this is a bug, please tell me how to fix it. Thanks.