Try connecting to Microsoft.com using their IP address as a test.
http://65.55.12.249
Check your DNS information by running this command in a Command Prompt window.
ipconfig /all
Write down your current IP addresses including DNS and Gateway.
Are your DNS addresses static or DHCP?
If they are static, it could be the ISP changed the addresses and they no longer work.
Try inputting 4.2.2.1 as Preferred DNS, then check the internet.
Access the router via the configuration page.
Check the addresses the router is assigned and using for the connection.
Message edited by lyleb on 08-20-2009 at 02:14:43 PM
Use a different DNS, your default DNS should be set as your router (192.168.1.1), if the server is down which happens then change the dns to another one, there are thousands of diferent ones, I suggest trying 208.67.220.220.