Spooky thing happens with Synaptics touchpad driver.
On win 7 I, as probably every thinkpad user does, use middle click as a middle click - for opening in new tabs, closing tabs in browser etc. It of course works for scrolling as well when clicked on website background. So, I have the function set to neither. (Setting it to scorlling is stupid, as then you can't us it for anything else, whilst you can scroll anyway when "neither" is selected)

The situation is somewhat similar on Win 10. Scrolling for whatever reason is selected as default, but when I change it to "Use as a middle click" and use Apply or OK, and close the windows - nothing happens, the button is still in scrolling mode, opening the settings again reveals that radio button flipped itself back to scrolling. Issue is same no matter if I use mouse setting under "settings" or under "control panel"

Anyone ever encountered such a problem? Any suggestions how to fix it?