NSS Uninterpretable Background Scans

My system will crank up the "Norton Security Suite is currently performing background tasks"  when I am busy using applications and performing work.

 

I don't mind if it scans away when the system is idle, but it needs to step aside if I use the system, and certainly not initiate tasks if I am using the system/keyboard/mouse & the screensaver is off.

 

I have daily scans set up, manual scans.

 

How do I set Norton to suspend scans when the system is NOT idle?