Wi-Fi connected but there is no internet access
You can try changing your wifi network settings from DHCP to Static and a little tweaking of DNS server addresses should work. refer this link for complete solution.

Under advance settings Change IP Settings from DHCP to Static

IP Address : Most probably your Gateway address will be 192.168.1.1 change your IP Address my changing last digit in this address use any value preferably between 2 to 20.

Change DNS1 to 8.8.8.8

Change DNS2 to 8.8.4.4