A few weeks ago or so, my Macbook froze during the middle of a Software Update. I waited about 15 minutes, but then finally cracked. Since this update in particular required a restart, I was in in no position to force quit Software Update, so I did the only thing I really could do. I held the power button. After restarting, I found the annoying flashing question mark, which meant that no operating system was detected on my Macbook. Something was wrong with the hard drive or the connections to/from the drive. I went into Disk Utility on my Install Disc but the hard drive is not recognized. My questions are: 1) Did my hard drive just fail coincidentally or was it likely something caused by Software Update? 2) Is there any way to recover my hard drive? I don't mind taking apart my Macbook. I do not wish to replace the hard drive with a new one or take it to an Apple Store, but I will to a last resort. 3) I'm having trouble starting up the Apple Hardware Test. My Mac shipped with OS X 10.5.2, so I held the "D" key during startup with the install disc 1 inserted in the drive, but the screen still went to the flashing question mark. How would I boot into the hardware test? Thanks for any help!