Visit PlayStation 3 System Software Update to download and install the most recent version.
To check what version of the System Software is currently installed on your PlayStation 3:
Reboot means to turn the networking devices off (i.e. unplug them from the power source), and then to turn them back on after a set period of time. This will allow the network devices to refresh their settings.
Please reboot all of your network equipment, including any Wireless access points, routers, Voice Over IP (VOIP) modems, and broadband modems for two full minutes. After two minutes, you can turn on (or plug in) your equipment.
During certain troubleshooting situations, it may be necessary to restore all of the PlayStation 3 system settings back to their original default configuration.
The Restore Default Settings feature will erase any previously saved settings and restore all of the following settings to the default:
Also, do not confuse Restore Default Settings with the Restore PlayStation 3 System option (the next option down on the menu). The Restore PlayStation 3 System option will not only restore the default settings, but it will also delete all hard disk content. (You will lose all saved content from your PlayStation 3 system's hard drive if you use Restore PlayStation 3 System.)