How To Resolve Wireless Adapter Connection To Wireless Router

Make sure your AP or router supports the same wireless networking standard that your adapter uses. For example, you can use 802.11b and G devices without any compatibility problems, but you can’t use an 802.11a adapter to connect to an 802.11g network. This may seem like a no kidding sort of solution, but if you’ve ever fretted over a seemingly dead PC, only to discover that the power cord was unplugged, you’ll agree that sometimes the obvious answer is the one.

Renew the router’s DHCP settings. Your router most likely uses the DHCP networking protocol to automatically assign IP addresses to all of the PCs on the network. You can often fix a dropped connection by entering your router’s firmware menu and using the firmware’s DHCP Release/Renew feature. Read Basic Troubleshooting Routers and Hubs
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Switch your wireless connection software. Chances are, you’re using the adapter manufacturer’s software. Windows XP includes the Wireless Zero Configuration Utility, but your adapter’s software overrides it by default. You can switch to the Zero Configuration Utility only if your adapter’s software permits it. Find the adapter’s icon in the System Tray and then right-click it. You may see Use Windows XP Wireless Configuration. Click the link, open the Control Panel and then open Network Connections. Next, double-click the Wireless Network Connection icon to view available networks.