So, I was running Tiger on my Macbook. We got the family pack of Leopard. Installed it on a MBP no problem. Next, it was my turn to install it on my Macbook. First it verified the disc, and then it began installation. Calculating... initially says 2hours, drops down to about 46 minutes, and I wait. I come back about an hour later, and it's on a blue screen, with just a cursor. I figure it's doing something. I come back about 10 minutes later, still on this non-action blue screen. So, I figure I outta turn off the computer. I turn it on, the apple logo appears, the little circle-thing starts to spin, then goes to the blue screen. This is normally when the white dialogue box that says "Loading Mac OSX" would come up in Tiger... but it doesn't. It just stays at this same blue screen. I eject the disc, try again, try with the disc, try putting the disc in later, etc, etc. At the end of the day, I have a Macbook that can only boot into a stupid blank blue screen. What's the deal?!