Connecting your computer to WiFi network created by your WiFi router
Windows XP
Make absolutely sure that you have installed Service Pack 3 or later.
On Windows XP computer open the wireless network selection dialog. To do this either click on a wireless network connection icon on system tray:
...or open the Start menu, select Control Panel, select Network Connections, find a connection that corresponds to your WiFi card, right-click it with a mouse and select View Available Wireless Networks:
Find your network in a list, click it, and then click the Connect button:
Enter your network's password and click Connect. It is very important to ensure that you're entering the password correctly, because sometimes, if the password is incorrect, it may look like you're connected to a network, but no actual file transfer will happen.
Wait while Windows registers within the network, and the Connected label appears against your network name in the list: