Background: I have owned my iMac for about 1.5 years maybe 2 (I really dont remember). I upgraded to Leopard about 4 months ago... machine still ran like a dream. My machine has run flawlessly until 2 days ago. I have not added any software in the last 2 months.
Problem: Computer would freeze up every 10-15 min when I was in the middle of somthing. After about a day of putting up with this, my machine restarted all on its own and when it was finished all of my user added programs on my Dock were gone and were replaced with the factory programs. The Safari icon was gone and replaced with horizontal static looking lines. The computer still freezes up every 10 to 15 mins and has rebooted on its own about 5 times (After a long freeze). I can still move the mouse around.
What I don't want to do: I Have way too much Music and Video. Reinstalling the OS is my last resort.
Request: If you are having this same problem please don't post. I'm looking for answers. You posting that you have a similar problem does not help me. Answers please!!! Thank you.