I think if the slider could be brought up with a right click when working in the menu, that would be great. (Of course, some folks don't seem to know about right-click....)

As for A/V programs: something to keep in mind is that no two programs catch and remove exactly the same threats. I'm not all that surprised that AVG caught something Norton did not, even though AVG is well below Norton in terms of threats detected overall. (And make no mistake - I am very far from a Norton booster. I came to have Norton when it caused problems in my computer a few years back and absolutely nothing would allow me to uninstall it. Even though it's now supposed to be better and quicker, I'm off it for good.) Using a variety of complementary but unrelated tools is a good approach to keeping virus-free (that, and using your head with browsing and opening downloaded files). I personally use NOD32 by Eset as my primary A/V, but various other tools are necessary for complete protection (e.g. Malwarebytes Anti-Malware, ComboFix).

FWIW.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3