With the understanding that I do not use Google products and my ability to assist with them is limited at best, you should probably review the comprehensive instructions posted for others. A representative sample can be found in these few:
Search marquis - Apple Community
Search Marquis - Apple Community
How to remove browser redirect malware? - Apple Community
In the end you might even consider completely uninstalling Google from your Mac according to Google's uninstallation instructions. That might resolve the problem. You can always install Google all over again if you really want it.
And get rid of Norton. Totally and irrevocably. Follow its uninstallation instructions. Rule 1 of Macs is don't install junk.