Sometimes the wireless on your computer accidently gets turned off by bumping a button, switch or hitting a key combination. Turning 'wireless back on' can vary greatly depending on if you have a laptop, desktop, and if your wireless is built into the computer or a separate device. If you can't find your answer here, refer to your computer’s documentation or manufacturer for more information.
Some laptops have a WiFi button that can be switched On or Off. The location of the button varies, but most frequently is found on the front edge or just above the keyboard. When enabled, the button should be illuminated as blue or green.
Another way to enable wi-fi is by pressing 2 buttons at the same time. Press the "fn" key and one of the function keys (F1-F12) to toggle the wi-fi on/off. You may see a small orange LED indicating the wi-fi is disabled.