Avast free antivirus and Adobe Lightroom

I am an active user of Adobe Lightroom which maintains a large database of all the changes that you make to photograph as well as updating the images files themselves whenever a change is made. I’ve noticed that whenever I move from image to image, or add titles or descriptions to my images, LR slows down and a potential culprit is Avast antivirus. Each time I make a change (or just move to the open program from another one on my Windows 10 machine, the Avast program takes about 15% of the CPU and after 10 seconds or so drops away. I’ve tried to exclude the folder that contains the LR database and preview files as well as the hard drive that contains the photos, but it doesn’t make a difference. I’ve just disabled all the core protections on Avast until the next restart but even so, the Avast program jumps into action whenever I make a change in Lightroom.

Is there some other scanning (virus scanning?) that takes place which is not disabled by turning off the four main core protection modules in Avast?

Steve