I was looking over your direct connection to the modem and your ipconfig /all results and saw that all the IP address listings are IPv6, not IPv4. I believe we should really look into your settings and do testing over the phone. Can we have someone call you from our corporate office on Monday? You let us know the best time.
Also, over the weekend, if you have time.
Try to access a website by its IP address. In command prompt, type "nslookup www.facebook.com"; or any website, and type the IP address that comes up in your web browser's address bar. If this connects you, we may need to help you make some adjustments.
Im thinking that Norton antivirus has changed this last configuration to push all web traffic through Nortons DNS server, there are several antivirus programs that do this and when their DNS server is down you get basically the same as your seeing