Browser could not connect to the Internet

I have a laptop that can connect to my network wirelessly and a desktop PC that can connect through wired network. This home network is connected with my DSL from Qwest. The problem is the browser that I am using on my desktop PC could not connect to the internet.
The weird thing is that, I can still receive emails and all my programs updates automatically. I can’t seem to connect via HTTP. I uninstalled and reinstalled my Internet Explorer 7 to no avail. I tried using other browser such as Firefox but the problem still occurs.
I don’t think the problem is with my connection because I can connect wirelessly with my laptop. I checked on all the settings but I have no luck. How can I fix it?
Please help.
