Internet connection

Hello,
I have a serious problem. Changed hard drive on my laptop. Since then had to re-install driver for my wireless. It picks up and connects to the internet just fine but I can't open any web pages. It keeps telling me it is unable to do so. I know it is connected because it allows my anti-virus and windows to update - i watched it downloads the necessary files but still no luck opening a web page. I selected the option to obtain an IP address automatically and the LAN settings are also on "automatic detect". Someone please help me.