Can't connect

Hello,
I went to go turn on my hp compaq presario laptop running vista and once it booted up, it said that Internet Explorer cannot display the webpage. And when I click on the diagnose Connection Problems its saying Windows did not find any problems with this computer's network connect but I get to skype with no problem. I then tried to connect via ethernet straight from my modem and it was still the same case. I have even brought the laptop over to my friend's but it says the same thing over there too. It is obviously a problem with vista but I have no clue what it is or how to fix it. I have been looking all over the internet for solutions but nothing has worked so far. Any help will be greatly appreciated.