Article: It's the series of curving lines in the far-right side of the task bar.  You may first have to click the ^ to the left of the volume or battery icon to see the Wi-Fi option. On Windows 7, the Wi-Fi icon looks like a series of increasingly tall bars. If you set up the router with a specific name, it should appear here. If you didn't set up a specific name, you should see the router's brand (e.g., "Linksys") and model number. It's in the bottom-right side of the Wi-Fi network's name area. You'll do this in the text box below the "Enter the network's security key" heading. If you didn't add a password to your network when setting up the router, the password (called a "Security Key") is on the back or bottom of the router unit. As long as the password is correct, your Windows computer will be reconnected to the wireless network.

What is a summary?
Click . Click your router's network name. Click Connect. Enter the network's password. Click Next.