Enable/Disable with laptop Wi-Fi button
Some laptops have an On/Off button or switch for the Wi-Fi device, like the button shown in the picture. It is usually found on the right side of the laptop. Find the button or switch and make sure it is disabled. When disabled, the button should not be illuminated or illuminated as orange or red, or the switch should be in the Off position.
Enable/Disable with laptop Fn and Function key
Some laptops enable and disable Wi-Fi using the Fn key and one of the function keys (F1-F12). As seen in the picture to the right, some laptops use the Fn and F12 key to enable and disable Wi-Fi and may show a small LED that is either orange when disabled or blue when enabled.
Enable/Disable in Windows
Look in the Windows notification area to find the icon for Wi-Fi or wireless Internet. Right-click with your mouse on the icon and select the option for enabling (or turning off) the Wi-Fi device in the pop-up menu. If no Enable option is available in the pop-up menu, there may be an option called Open Network and Sharing Center. If so, select this option and then select Change adapter settings. You should see an icon for the wireless network card, which you can right-click and select Enable.
Note: In Windows 8, when you right-click the Wi-Fi icon, check to see if Airplane Mode is turned on. If it is, turn it off to enable the wireless network card.
The Wi-Fi adapter can also be enabled in the Control Panel, click on the Network and Sharing Center option, then click on the Change adapter settings link in the left navigation pane. Right-click on the Wi-Fi adapter and select Enable.
Enable/Disable in Windows Device Manager
Access the Device Manager by right-clicking with your mouse on the My Computer icon on your Desktop or in the Windows Start Menu. Select Properties from the pop-up menu, click on the Hardware tab in the window that opens up, and click on the Device Manager button.
Note: In Windows Vista and later, there is no Hardware tab. Just click the Device Manager link in the System window.
Find the Wi-Fi adapter in the list of hardware devices. Right-click on the adapter name and select Enable from the pop-up menu. If no Wi-Fi adapter is found in Device Manager, the Wi-Fi adapter drivers are not installed.