That works.

How to Add or Remove Brightness Slider on Action Center in Windows 10

RE: Virus Total - 1/74 is a false positive detection anyway but that program is only for laptops/ notebooks and...

If using a laptop you can run this to get a slider with 1% increments (arrow up/ down key)

Download BrightnessTray 1.2.5


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If using a monitor you'll have to try something else;