How do I get rid of this?

The reason I want to get rid of it is because every time I do this, I move the mouse down to the bottom of the screen, and when I hang on this area, the mouse jumps completely to the top left of my screen. This is very annoying. I really need to get my mouse to bypass this "function", which I never use in any case, and maybe just adds sun to the overhead. So any suggestions would be helpful.
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