Cubase 11 Pro Mouse Help

Hi
When i’m edting on the project screen the mouse doesn’t work properly.
If i click and drag some parts for example it seems to do what it likes.
If i’m dragging it can lose the parts or cut them up just about anything really.
Its taking ages to do projects because i have to keep trying to do the same thing over again.
So should i look at Windows 11, drivers or is it something with Cubase 11 pro that i can set.