Wi-Fi antenna allows a PC connection to the Internet using radio frequencies. That is also known as the wireless local area network (WLAN). To support WLAN, a desktop PC needs an expansion wireless card having the PCI (Peripheral Component Interconnect) interface with the attached external antenna. Wireless cards are especially convenient in a household with several desktop computers connected to one network router to avoid complicated cable routing.
Turn off the computer.
Remove the side cover of the computer case. Note that due to a variety of case designs, you will need to refer to your computer manual for instructions.
Insert the wireless card into the PCI slot of the motherboard. Secure the card with the 4mm screw.
Close the computer case.
Turn on the computer. When the Windows operating system loads, log in to the administrator account.
Insert the CD with wireless card drivers into the computer's CD/DVD drive. Follow the prompts to install the drivers on your system. Restart the computer if prompted.