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Via the keyboard
Many laptops have a shortcut on the keyboard which allows you to enable and disable the Wi-Fi adapter, as quickly as possible, and some laptops have an indicator (small light) which blinks when the adapter is on. This is the main Wi-Fi on/off switch, i.e. you won't be able to activate the module no matter how hard you try, if it was disabled via the keyboard shortcut.
If the Wi-Fi indicator doesn't blink, it is possible that you have accidentally disabled the wireless adapter while working on your laptop. To enable the Wi-Fi adapter or disable it, press and hold the Fn button and the Wi-Fi dedicated button (the button with a wireless-antenna icon).
Another way to activate or deactivate the network card is via the Network Connections setting. It hosts all the network devices that are attached to your computer, and allows you to activate, deactivate, or modify their settings.
To activate a network adapter, follow the steps below:
Right-click the start menu and select Network Connections;
Right-click the Wi-Fi icon and select Enable (you may need to write the administrator's username and password)
* If you have more than one Wi-Fi icons, right-click the grey one
** If you can't find Wi-Fi, but you see icons like the ones shown below, that means that the connection has been renamed. Right-click the grey icon and click Enable.
*** If you don't see any icons, that means that you might be experiencing a wireless-network-driver-related issue. Click here to learn how to download and install the appropriate driver.
Click the X button in the top-right corner of the window to close it
Note: To deactivate the network adapter, right-click the Wi-Fi icon (or another name, if you've changed it) and select Disable.
Feel free to watch the video below, which will show you how to enable the Wi-Fi adapter:
Feel free to watch the video below, which will show you how to disable the Wi-Fi adapter: