The problem was solved in a different location, at the link below:
http://forums.cnet.com/7723-6122_102-641970/connected-to-wifi-but-no-internet-access-on-hp-laptop/?messageId=5680548#message5680548
Hope this helps.
Grif
I am connected to wifi but no internet access on HP laptop running Vista. My other devices including smart phones and Macbooks have no issues. I disabled firewall, uninstalled antivirus, reinstalled drivers, updated BIOS settings to default. I used a restore point from the last time the computer used to be able to access internet, but no luck.