I bought an HP 540 laptop and did fresh installation of Windows XP Professional.
I installed the wireless drivers to connect to my WIFI and it was done successfully, however, as soon as i opened the internet explorer for browsing, I was unable to visit any website.
I performed the "Diagnose Connection Problem" and got the error message
"Windows cannot connect to the internet using HTTP, ..... Check the firewall settings for the HTTP port (80), ... "
Strangely, I am able to ping the websites
I did the Windows XP installation again but the error still persists