When you go online (I presume by clicking IE) what do see...
What happens if you type say click here into the very top line of the browser and press enter.
Just reading your question again I think you need to be sat in front of the thing really :)
With any web problems open an elevated command prompt by typing cmd.exe into Vistas search box and then right click that program (cmd) to run as admin.
ipconfig /flushdns and press enter.
Then type, net stop dnscache and enter, followed by, net start dnscache and press enter.