Instructions
Select the "System Update" option from the "Settings" column of the PS3 main menu.
Choose "Update via Internet" from the Settings menu. This starts an online check for the latest version of the system software.
Select "OK" from the screen that appears. If your PS3 is up to date, it returns you to the main menu. If it is not up to date, it displays the message "The latest update was found" and the version number of the software. Press "OK" to begin the software download. The PS3 automatically installs the update when the download completes, and restarts after installation.