Hello So I updated to Mavericks a couple of days ago and everything seemed to be working fine, until last night when my computer ran out of battery and turned off. I plugged in the charger and tried to boot it up but I keep getting the Apple screen with a grey loading bar just underneath the logo. Takes it about 5-10 mins every time and only reaches about 9/10 of the way when the mac shuts down and begins the entire process again. Thankfully I also have Windows 7 installed as an alternative operating system so I can still access all my files but I can't stay with it too long, I already miss OSX. Any suggestions would be greatly appreciated!