Hello and welcome to justanswer. My name is***** will be assisting you today. I am sorry to hear that you are having such trouble. I will try my best to help you.
Are you seeing this Norton as search or as a toolbar in Google chrome also are you trying to make Google as the start-up/home page?
OK i will guide you step by step to do that.
Is Google Chrome open now?
OK click on the 3 dots in the top right of the chrome and that will open different options from that click on settings.
See if you can open settings page and let me know
You are welcome.Good you can change the homepage/start-up page and all in that settings page.
Is there anything else you like to know ?