Flickering at the bottom of the screen, where the taskbar is.

Any idea on how to solve? It happens when I open windows explorer, or use anything in fullscreen, program or website. VSync is off. No display options in nvidia control panel. (Cant diable gsync) Adaptive sync is off. Flickers regardless if the taskbar is hidden or not. Can take a picture if needed. It gets way worse when lowering the refresh rate.