To set up wireless Wi-Fi for a laptop in Windows 7, right-click on the Wireless Network Connection tray located at the bottom-right corner of the desktop, and select View Available Wireless Networks. Click Refresh Network List to view the available networks within your range.
Click on a particular wireless network within your range, and provide the password if it is a secure network. In unsecured connections, the laptop connects to the wireless network without requesting for a password. A signal bar appears at the bottom of the screen next to the Bluetooth and battery icons when the laptop connects to the wireless network.
In Windows 8, open the Charms bar on the right-hand side of the screen, tap the gearwheel icon to open Settings, and then tap the Wireless Network icon that resembles ascending network bars to view the list of available networks. Toggle the Wi-Fi slider to the right to switch it on, choose your preferred network from the provided list of available networks, and provide the security key if required. Tick the check box next to Connect Automatically to connect to the network anytime you are within the required range. On the new window, choose your sharing options to begin browsing the Internet.