As for the Android edition, it's an Editors' Choice.
These typically might be pushed to your computer at least once day.
'"Mike O" posted the above, on the first page of the below 6 page thread at the Norton Internet Security sub-forum, at Norton's Community Forum:"Norton Internet Security Is Performing Background Tasks - Causing System Instability Problems"I realize you stated you didn't have another A/V running. What he puts forth in his explanation, sounds like an area you may want to investigate. Additionally, you will (no doubt) get other suggestions here, by those familiar with the product.
As a Comcast Business Internet customer, you can purchase Norton™ security software in the Cloud Solutions marketplace.