Because of your hand shaking do you occasionally push the right hand button when you're using you mouse? Does an unwanted menu keep appearing?
Disable the right button on your mouse by pulling the cover off with a pair of pliers. Then use the button on the bottom right hand side of the main part of your keyboard if you need to bring up the on screen menu.The button has an icon of a page of script with an arrow pointing to it.It's often next to the Windows button.
If you have an expensive mouse you might be able to disable the right hand button in the software.
I had never used this button before!!!