One of the biggest annoyances for gamers using the PlayStation 3, or PS3, is unexpected system crashes. If your system experiences a crash, the files on your system are either missing or corrupt. To fix this problem, use the PS3's built-in System Restore function. When you perform a system restore, your custom configurations and saved games may be erased permanently, so back them up before proceeding.
Turn off your PlayStation 3.
Hold down the "Power" button. The game system powers on and then powers off.
Press the "Power" button again until you hear two beeps, then release the button.
Plug in your controller via the USB outlet when prompted.
Press the “PS” button on the controller. The Recovery menu appears.
Select “Restore File System” from the Recovery menu. Follow the onscreen instructions to check and restore corrupt and missing files on your system.