As a side issue...
You should actually do this every year.
Even more often if you spend a lot of time on the computer.
This is recommended by Kim Komando (the computer guru) in one of her recent emails.
I was shocked to see how well this works, and how far off mine was!
To re-calibrate your mouse, click and hold on the capital G below, then drag it toward the small g.
If it doesn't work immediately, you might want to clean your mouse, as the calibration is off.
Good lord!! You'll believe anything