Lost all ability to connect to internet - Please Help!!

This evening, opened my MBP 2010 and found that my networks will not connect to internet. It says I'm connected to wifi but nothing will load, no apps that require network connection, safari, nothing. Tried ethernet cable which says connected with DHCP when I'm looking at network prefs, but no connection of any kind. I have a Verizon Fios router with Time Capsule (most recent version from Jan 2012) creating a separate network and a AEBS and Airport Express extending that network throughout the house. No problems of any significance (that couldn't be solved with turning router on and off) in the past. Of note, my wife's Macbook Air (which I'm typing this email on) is having NO problems connecting to either the Verizon network or the Airport network. On my MBP, I get neither. I have tried deleting the networks from Network Prefs and adding back but they just will not connect. Is there a way to completely reset my network prefs and start over? Do I need to do that? How can I have one Macbook that connects to everything and another that can't connect to anything. Both are running 10.7.4 and have similar software installed. I tried booting in SAFE MODE and get the same results. I even get the exclamation mark inside the wifi symbol on my menu bar for both of them. WHAT THE HECK is going on??!!? PLEASE HELP!!!

OK, I understand that you can connect to the Verizon router using an Ethernet connection and wireless does not work.
I also understand that you have deleted all of the network listings in System Preferences > Network > WiFi > Advanced.
Please check again to make sure that all of the listings are cleared out. Be sure to click OK and then Apply when you do this.
Next, open Macintosh HD > Applications > Utilities > KeyChain Access
Look for any listing with the name of the Verizon wireless network. Click on that listing to highlight it, then click the Delete key on your Mac.
Then do the same for any of the wireless networks that are provided by the Apple devices.
Close KeyChain Access and restart your Mac.
See if you can log on to the Verizon wireless network now. You should be asked for the password to connect, if you successfully deleted the old networks and the listings for the password in KeyChain Access.

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Lost all ability to connect to internet - Please Help!!

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