You can change Wi-Fi settings on a laptop through the Network and Sharing Center section of the Control Panel. These settings are responsible for connecting to available wireless networks.
Click on the network icon on the system tray and select "Open Network and Sharing Center." Alternatively, click on the Start button then Control Panel. Click on the "Network and Internet" option, then "Network and Sharing Center." A window that displays basic network information and connections opens.
Select "Change Adapter Settings" from the list of options available on the left side of the window to display all available wireless and local area network connections. Double click on the wireless connection you want to change and select Properties in the dialog box that opens. To access these properties in Windows 8 through the system tray, click on the wireless network you want to change and hold down the mouse button to display the wireless settings. Select "View Connection Properties" to open the wireless network Properties dialog box.
The Properties dialog box displays the Connection tab, where you can change connectivity options, and the Security tab where you can modify wireless security and encryption type as well as the network security key. Make the necessary changes and click OK to close the dialog box.