black blink at open image

[Mr_Rata]

Hello, today I did a fresh install of my windows 10(drivers and all is updated) and when I open image in full screen from everywhere (like windows explorer, my images..) I get a fast black blink. I remember before did windows fresh install.that before the opening images was smoother.
(I've Ryzen 9700x with 64Gb RAM)
Are way to solve it ? maybe I miss some option in anywhere? thx so much

[xnview]

do you use theme? what do you have in Settings>Startup?

[Mr_Rata]

Thx for help, you are right, I already found the solution, I just had to activate in general -> start -> viewer - full screen