Instructions
Navigate to the ̶0;Settings̶1; tab on your PS3 and select ̶0;System Settings.̶1;
Move down the list and select ̶0;Restore PS3 System.̶1;
Select the drive that you want to restore, which will be the system's onboard hard drive.
Confirm that you wish to restore and that you are aware that the hard drive will be cleared.
Restart your PS3 system when the process finishes.