Built-In Wireless

• Newer desktop computers come with built-in wireless capabilities, much like a laptop. The antenna and wireless networking functions are integrated into the computer's design. To find out if your computer is already capable of using Wi-Fi, open the Network and Sharing Center and choose "Connect to a Network." If you can see your wireless network in the network list, your computer is already enabled to work with a wireless modem.
  
  

Range

• Because a stationary computer does not move freely, your computer will need to be in range of the wireless modem in order to use it to get online. The modem range varies by type and location. Wireless-N modems broadcast farther than Wireless-G modems, for example, and high-gain antennas are stronger than standard omnidirectional antennas. If the computer and modem are within range, the signal can still be weakened by metal objects, like refrigerators or file cabinets, and thick walls. Wireless signal boosters installed between the modem and the stationary computer increase the range.
  
  

USB Antenna

• In order for a desktop computer to use a wireless network, it must have a network adapter. While you can buy card-based adapters to install in your computer, the signal may not be strong enough. USB antenna adapters are a more powerful alternative. The antenna plugs into one of your computer's USB ports and picks up the signal. USB network adapters are available at any computer store.
  
  

Setup

• Before you can use wireless Internet with a stationary computer, you will need to set up the connection. When you install a USB or card-based adapter, an installation program will walk you through the setup process. After installation, you can edit the wireless connection from the Network and Sharing Center or the administration page for the adapter. For easier setup, choose an adapter made by the same company that manufactured your modem.