Ie8 won't connect

Hello,
i have gone through most or all the comments on ie not connecting. o have an acer laptop with vista home premium on it that will not connect. i can see the rest of the network and ping sites outside, so i figure the system is working. ie8 was reset in the adcanced tab i even tried to install firefox no connection. i wen into the firewall and added ie8 and port 80 just will not connect.PLEASE HELP thanks