mouse

I will test another mouse tomorrow. If the result will be the same, mouse wont matter

Just make sure it is a different mouse, with enough "differences".

Check that the mouse has a different DPI resolution, or if it's a configurable gaming mouse, choose different DPI settings.

If it is a special gaming mouse with configurable DPI sensitivity or refresh rate, try to set the sensitivity to the lowest setting, either through a PC application for the mouse, or if the mouse has a switch use that.

Do you have another mouse you could try to use? The more basic the mouse is, the better.

It isn't problem with sensivity, but with strange moves. In the main menu, mouse moves are normal, but when i'm in the game, even when I very fast move my mouse, mouse moves are very slow and when I stop mouse, suddenly mouse moves ar very fast and moves
stop

1) Flag a cell by pressing, again press the same flag with the right mouse button,

2) drag the mouse, with the right mouse button still pressed, to a number that is fully flagged,

3) with the right mouse button still pressed, press and release the left mouse button to clear the fully flagged number.

When you change the aiming setting to "mouse", the game is preparing to use a full mouse and keyboard. If you don't have a mouse connected, the system won't be able to register aiming because it expects that input from the mouse, not the controller.