I was recently grounded by my parents, so I had to give up all of my electronics. When I handed over the Mac, I wasn't aware that it was in sleep mode. So it was firmly locked away for a month in sleep mode which I'm sure is very bad. So I got it back today, and as soon as I turned it on I had to update Itunes and Adobe Flashplayer. A tab came up, stating that I needed to restart my computer. I restarted it with no trouble, but I thought that it would be a good idea to let my mac rest for a couple minutes before I started using it again. So I shut it down, but when I tried to turn it back on there was only a grey screen with the Apple symbol and a loading wheel below it. When I go to Disk Utility, I can not repair the hardrive. Instead, a tab comes up saying that I must backup as many files as I can, re-format the disk, and then restore the backed-up files. How do I do those things and what could have caused this? It will not go into Safemode, and resetting PRAM and NVRAM results in the unchanging grey screen although I do hear the second chime. When I put it into verbose mode, the last thing the terminal reads is: 'kernel is LP64 [I0BluetoothHCIController : :setConfigState] calling registerService' I went to the recovery hardrive, but could not install Lion, since the hardrives were locked. I don't have a backup in TimeMachine. My laptop is a 13" OS X MacBook Pro Lion.