I am guessing you are not using a router, so I have no idea why you are using the Network Connection Wizard.
First disable the network device that is not going to connect to the internet.
1. Goto the Control Panel.
2. Switch to classic view if it's not already in classic view(there is an option in the left pane).
3. Click the Network Connections icon.
4. Right-click the network device you wish to disable and choose Disable.
Exact Steps for setting up a PPPoE.
1. Open Internet Explorer.
2. Goto Tools > Internet Options...
3. Click the Connections tab.
4. Press the Add button.
5. Choose "Connect to the network via broadband." Click Next.
6. Enter a name for your connection (doesn't matter what you name it). Click Next.
7. The Broadband Connection Settings window will pop up. By default Windows sets this to a PPPoE configuration. To verify this click the Properties button where it says User name, and goto the Networking tab. You should see "Point-to-Point Protocol over Ethernet (PPPoE)" selected in the first drop-down menu.
8. Enter your User name and Password. Your User name is the E-mail address of the main account. Something like
JonDoe@sbcglobal.com.
Click OK and you're all set.
Now goto Start > Connect To. Select that connection, it will prompt you for User name and Password, unless you had it set to the save the password, then the information will be entered for you.