60Wireless LANCAUTIONz Do not use wireless LAN on airplanes, in hospitals, or in other locations where wireless LAN signals mayaffect devices.Follow the instructions of airline companies and hospitals. If you use the computer in these locations, turn off the wire-less LAN.z To avoid unauthorized access to the computer through wireless LANWe recommend you to make security settings such as encryption before using wireless LAN. Otherwise the flashmemory data such as the shared files can be exposed to the risk of unauthorized access.NOTEz Communication is established through the wireless LAN antenna (A). Do not blockthe antenna area with your hand or body.z You cannot use the wireless LAN function together with the Fast User Switchingfunction.z The transmission rate will be lower when a microwave oven is used near by.z To use wireless LAN, set [Wireless LAN] to [Enabled] (default) in the [Advanced -Wireless Configuration] menu of the Setup Utility (Î page 68).Before using a wireless LAN, turn the wireless LAN communication on.Turning on/off the wireless LAN communication1 Slide the wireless switch to turn on/off wireless LAN. (Î page 57)z When turning on wireless LANIf you cannot turn on wireless LAN using the wireless switch, confirm the Wireless Switch Utility setting (Î page58), If you cannot turn on wireless LAN in the Wireless Switch Utility, try the following procedure.A Click or on the notification area and click [Network and Sharing Center].B Click [Manage network connections].Using the Wireless LAN FunctionA