The machine is freshly bought and I upgraded its system from the pre-installed Windows 10 Home Single Language Edition to Windows 10 Pro via the windows store and after that the touchpad buttons don't respond to clicking or pressing or whatsoever at all. I couldn't find anywhere this problem has been addressed. What are the possible causes and solutions?
This was solved by updating its mouse and keyboard driver: Drivers & Software
Probably you do not need this information now but maybe it will help someone. I bought t470 and had the same problem with stock win 10 pro. I thought about sending it back but I uninstalled touch driver and probably now windows uses some default one. I have almost fully working touchpad with buttons (of course there is no fancy functionalities like shrinking touch area).