First of all, it would help the answerers of this thread if you could respond with a little more information about your setup:
1. What version of Internet Explorer are you using?
2. What kind of internet connection do you have (dial-up, ISDN, DSL, cable, satellite, T1, etc)?
3. Who’s your ISP?
4. Are you connecting to the internet through a router?
Have you checked to make sure you’re not “Working Offline”? In Internet Explorer, pull down the menus until you see a “Work Offline” option. If it’s got a check mark next to it, you won’t be able to access any webpages. Just click it to remove the check mark, then try loading your webpage again.
If that doesn’t work, try firing up your command prompt and pinging a well-established site like google. Go to Start -> Run, type in “cmd” without the quotes, and press enter. You’ll be faced with a black command prompt. In the prompt, type “ping google.com” without the quotes. If it says something like “64 bytes received in 32 ms,” then you’re connected to the internet. If it says something like, “request timed out” then you’ve got connectivity problems.