forrest, try this first"Turn the console off by holding/pressin
Hold the power button until you hear a first and second beep - followed by a quick double beep, release the the button. You should now be a the option menu, such as "System Restore" etc, here you select "System Restore" and follow the onscreen instructions. If this should not resolve the issue, repeat the steps to get to the menu option and select "System Reset". This should resolve your issue but you will probably lose saved game data.
The only other way would be by removing the HDD from the PS3, then reformatting it with a computer and then reinstall the drive in the PS3. It should then be restored by the PS3 to the appropriate Sony firmware.
Of course, you also want to keep in mind that you might have HDD problems and that you may have to replace the drive. There may be a true reason for the drive to become corrupted. Hope this helps, good luck.