Keywords: 联想笔记本, Lenovo, ThinkPad, mouse, scroll wheel, left/right tilt, W540, driver, middle button/key
Download mouse driver from http://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkcentre_drivers/e1mie05us17.exe
This driver will install a mouse suite which you can use to set behavior of scroll wheel's left/right tilting.
Reference: http://support.lenovo.com/us/en/downloads/ds014888