I have a problem I do not know how to fix.
The mousetracking says the movement is 1:1.
But I can tell you there is something really wrong.

When I have the mouse in the middle of the mousepad. I make circles with my hand. If I do this over and over, while ending up on same spot I started, the cursor is more towards upper right, or lower left respectively to if I do clockwise or counter-clockwise movement.

How do I fix this?
I can't aim at all with this. I even have problems clicking icons in windows.