I just recently bought an iMac a few months ago and the other night my wife was using the computer when it froze. She could not do 'force-quit' so she powered off the machine with the power button and it would not reboot. I tried again several times, only to get to the grey screen and have it freeze. I was able to start from a system disk, but the hard drive cannot be found, so I can not do any repairs etc. We called apple and they said something is wrong with the drive and to bring it in to a store after setting an appointment. It is under warranty, so any repairs are covered, but I am worried about lost data if the drive is fried. Has anyone had a similar experience? Any Suggestions? Apple tech said they DO NOT do data recovery, but I found this software (http://www.macintosh-data-recovery.com/detail-features.php) that may work from my laptop to aid in data recovery. I do normal back ups but I'm afraid I have lost a several files for my wife's work, pictures and iTunes purchases that were not backed up. Thanks in advance!