Hi, First I have to let you know that I barely have any idea how Mac OS works. I've had this 13.3" MBP for about 6 months now and have almost always ran Windows 7 on it without any issues using BootCamp. NB: last thing I did was simply close the laptop when I woke up (fell asleep around twenty minutes into Frozen, the latest disney) and nothing else. I got home this evening and when I finally opened the MBP up it was on the Mac log in screen so I shut it down and rebooted so it would go straight to Windows as it usually does. But nope. It went straight to Mac OS X again. I can't even see the windows (BootCamp) partition anymore. I was able to locate the Disk Manager under Mac but since I don't know how it works or maybe it doesn't even work at all right now that's been of no use. All I could do was get "disk0s3"'s information to show up and it says it's not mounted. It's also greyed out. I really hope I won't have to do a fresh install since this computer was given to me by my boss when he got a new laptop. I'm an IT technician so I should, in theory, be able to comprehend most of what you'll say, although I don't quite know my way around Mac OS X, and follow the steps you'll give me. Based on the little information I am able to give you, can anybody help me tongue.gif ? Thanks in advance.