Posts: 452 +357
Majority of the free antivirus programs have real time protection as a primary function.I use Norton because I've been using for years. But I also use Malwarebytes along with Norton. I do recommend you use a professional version of whichever software you us to get real time protection. Some free versions don't have real time protection and you have to manually run a scan to remove malicious things.
Usually only specialized tools are manual scan only.
+ TBH, wouldn't touch Norton.