|How do you know that you are connected to the internet? Do you have an alternate browser like Firefox, Chrome, Safari, Opera, etc. to try?|
If not, open a command prompt by holding down the Windows Key and pressing "R" on the keyboard. This should bring up the "Run" dialog box. In the Dialog box, type in "cmd" (without the quotes) and click "OK". This should bring up a command prompt window. In the command prompt window, type in "ping google.com" (again, without the quotes) and press enter.
If the results show "reply from xxx.xxx.xxx.xxx: bytes=32 time=xxms TTL=XX" then you are connected to the internet and DNS is working properly, which means that the issue is with internet explorer, a firewall config, or proxy settings.
If the results show "Ping could not find the host google.com. Please check the name and try again.", then the issue is with DNS lookups failing.
If the results show "Request timed out" then the DNS lookup was successful, but the connection to the internet is to blame. This could be a number of things, including network connectivity, firewall config, or proxy settings.
Please test pinging google.com as specified above and let us know what the results are.
IT Desktop & Network Consultant - MOS Master Certified, MCP, MCSA, MCITP - Windows 7, CCNA Certificate Pending, A+, Network +