What should I do if I cannot use the wireless LAN function?

• Make sure the WIRELESS switch is set to ON. [Details]

• To use the wireless LAN function on your VAIO computer, you need to set up the function. Check the wireless LAN settings of the computer. [Details]

• If connection utility software supplied with a third-party wireless LAN product is installed, uninstall it.
  If connection utility software is installed, Windows may fail to configure the wireless LAN settings. Be sure to take a note of your settings, (such as security keys) before uninstalling.