Instructions
Disabling media server connection
Use the controller's directional pad to scroll through the list of of options on your XMB home menu. Open the option for "Settings" and choose "Network Settings."
Use your controller's directional pad to select and highlight "Media Server Connection." Press the "X" button on your controller.
Choose "Disable" from the available options and press the "X" button on your controller to disable your media server connection. You may be asked to verify that you want to continue. Simply hit the "X" button again to confirm that you want to sever the connection.
Restoring default settings
Use your controller's directional pad or joystick to scroll through your XMB home menu. Using your controller's "X" button to select, choose "Settings" followed by "System Settings." Choose "Restore Default Settings."
Scroll through the list of settings PlayStation will restore. A restoration to your default settings will erase any saved data you may currently have and will wipe clean everything from your system settings to your sound settings. It will also delete the date and time you chose for your system. Hit the "X" button on your controller to begin restoration.
Restart your PlayStation 3 after the restoration process has finished. You will be taken to the initial setup screen. Hit the PS3 button on your controller to begin initial setup. Follow the prompts on the screen, using your "X" button to select, and re-enter all of your settings preferences.