ACER LAPTOP CAN'T CONNECT TO INTERNET

I HAVE TRIED EVERYTHING, BUT I JUST CAN'T CONNECT TO THE INTERNET WITH MY LAPTOP. I DO NOT USE THIS LAPTOP MUCH, BUT THE OTHER DAY I THOUGHT I WOULD UPDATE IT, YOU KNOW WITH ALL THE LATEST UPDATES, WINDOWS, ETC, BUT WHEN I ATTEMPTED TO SIGN ON TO AOL, OR I.E. I GOT THE ERROR MESSAGE THAT "I COULD NOT ACCESS THE INTERNET". I CALLED ATT, THEY CHECKED EVERTHING OUT ON THEIR END, AND ON MY END, REBOOTED MY MODEM, AND TOLD ME THE PROBLEM IS IN MY LAPTOP. DO YOU HAVE ANY SUGGESTIONS FOR MY, THANKS!