I'm not sure also :P (That's what I did, I changed the network configuration on control panel)
I've just tried again and got the same result: I press ctrl+L to focus on the url bar and then write something, avinashtech for example, without Norton DNS it performs a google search with the option " I'm feeling lucky " and I found myself on ; with Norton however it performs and "ask.com" search and I find a list of results for avinashtech.