Posted 20 August 2008 - 02:18 PM
This just happened to me last night..
I took my computer apart and put it back together and it said "Operating System Not Found"
Go to Google and type in How to access BIOS
See if you can access the BIOS [Basic Input-Output System]
If you can, look and see if your hard drive is registering to the computer
If it isnt there, if you have a backup computer, take your hard drive out of your computer and put it in the other one,
All your files will still be there.
Thats what i did, and my computer is up an running.
Let me know if you have any success :D