Instructions
Press the button on the front of the PS3 console to turn it on.
Select "Settings" form the main menu and go into "System Settings."
Choose "Restore PS3 System" from the choices available. Be aware that restoring your PS3 system means that all data you have stored on the hard drive will be lost, such as trophies, files and saved games.
Click "Yes" if you are okay with losing all of the stored information on your system and continuing on with the system restore.