I have repeated warnings (every two minutes) and when I scan it reports no threats. I can’t turn the warning off and it is very disruptive
Welcome to the forum. 
What warnings ??? Can you post a screenshot ???
The more information you supply, the easier it is to solve your problem.
Hi frbernard: Also Operating System, Security software you have installed, and what program is giving you the warnings…Yes the more info you can give about the warnings…will help any of the experienced evangelists help solve your problem 
Good luck