Have you tried disabling norton?
Worth a shot.
If that doesnt work go to network and sharing centre.
On the left you'll see an option "Change Adaptor Settings"
Right click on your adaptor and click properties.
Left click on the IPV4 (Internet Protocol Version 4)
Then click on properties.
If it is not already set,then change it too Obtain IP Address and DNS automaticly.
If that doesnt work open Command Promt (Windows key+R)
Then copy it here