Hello, I have a 2nd gen MacBook, running Leopard. I did a clean install of Leopard when it came out. I did the latest Software Update. Then the computer went to reboot, I shut down any programs that were running before restarting. Once I told it to restart the Finder went away, but I could still see my desktop picture. After at least 30 minutes of waiting. I had to hold the power button down in order to shut the system down. When I went to power the system up again I got the Setup Assistant. I then booted to the Leopard Install disk and Repaired Permissions and did Repair Disk. This did not help. Upon exiting the Leopard disk I ran Startup Disk and selected my Hard drive, which it saw as running OS X 10.5.1. I also tried /sbin/fsck -fy the first run found some problems, so I ran it again and it said everything was fine. I am fairly new to the Mac world and those are just some of the common solutions to problems that I could find. I am at a loss now as to what is going on. I do have AppleCare, but the nearest Apple store is over 45 minutes away. So, if anyone has any ideas as to what could of happened and save me a trip that would be great. Thanks.