1) Does the same thing happen when you go to http://173.194.37.80

2) What happens if you change your DNS servers to 8.8.8.8 and 8.8.4.4?

3) Are you using the default Windows HOSTS file?

4) Are you using a proxy server?

5) Are you behind a company firewall?

6) Does the same thing happen in all browsers?

7) What happens if you Reset IE?

8) Does the same thing happen in Safe Mode with Networking?