Turning Off Wi-Fi for Personal ComputersMost computers and wireless network adapters possess a light (LED) indicating whether its wireless radios are currently active. Using a menu option or key press combination. you can quickly toggle Wi-Fi on and off. Details vary depending on the type of computer; consult the manufacturer's documentation for more information.
Turning Off Wi-Fi for Wireless RoutersSome broadband routers allow you to turn off wireless, while others do not. If supported, this option exists on the router's administration pages. For example, on many Linksys routers you can disable Wi-Fi as part of the Wireless Basic Settings by changing the Wireless Network Mode to "Disabled." Wireless routers all generally possess LEDs you can use to confirm whether the Wi-Fi radios are operating.
If your router does not support a built-in feature to turn off Wi-Fi, you have only a few options as explained below.
Removing Wi-Fi Adapters and AntennasIf your computer's Wi-Fi adapter is connected by cable or inserted into a card slot, you can detach (remove) it to guarantee the Wi-Fi radios are disabled. Follow the recommended procedures for your operating system when removing network adapters, as improper removal can cause you to lose data
Some wireless routers feature external, detachable antennas. Removing these will affect the ability of the router to use Wi-Fi but will not turn off Wi-Fi.