Google chrome

Hi.Don't know whether this is a Norton 360 problem or a problem with Google, or my ignorance!!.

After downloading Norton 360 I find that I can only connect to the internet( Google Chrome) upon start-up of the my laptop.If I disconnect from the browser whilst using laptop I cannot reconnect again unless I restart it.I have checked firewall settings in Norton and this shows  Google Chrome as "allow".

Any suggestions on how to resolve problem would be appreciated.

ps I have tried system recovery without success.