I came home today and when I logged onto my Macbook Air and it told me it wanted to install an update and restart. I clicked okay and went away. When I came back it had booted into OSX Utility mode. I restarted a few times but got the same thing. It wanted me to "verify" my disk and then "repair" it. Every time I try to do that, it fails and says it cannot complete the job. I tried the option to reinstall the operating system but whenever I do: 1. It won't show my Mac HD as an option, because it can't mount it; or 2. When it does mount, it won't let me reinstall the software because the HD is "locked". Bootcamp still works and I am in bootcamp now. This is a Macbook Air, so I can't boot from a DVD. What can I try next?