Question Mouse cursor randomly going down or edge

[Zaraki Zenken Besin]

Ive been having this issue for months

my mouse cursor randomly going down the screen or bottom left, anyways basically its moving on its own very fast and going down.

at first i thought its a virus but even with malwarebates or kaspersky, there is no virus at all. I even reformat my pc and still i have this issue

I tried changing my mouse too but still the same.

does anyone knows whats the cause of this?

 

[Lutfij]

Make and model of your mouse? Might want to see if there's a spec of dust under your optical sensor(assuming that the mouse does have an optical sensor).

 

[Zaraki Zenken Besin]

Make and model of your mouse? Might want to see if there's a spec of dust under your optical sensor(assuming that the mouse does have an optical sensor).

hi, i tried 2 different mouse
just a chinese brand mouse, mouse optic, yes mouse have optical sensor i guess.
do i need to buy a new one?