Right click stopped to work

[Eudoxus]

Hi!
A couple of days ago my mouse on T500 started to behave a little strange - right click stopped to work at all, but the left click sometimes works as the right click, sometimes as the left and sometimes does not work at all (looks like it depends on the application that I try to use). The only thing that I changed on my system that day was installing the Goodle Disc.
I tried many things to deal with this problem - re-installed synaptic drivers, checked the relevant settings, and today even refreshed my Windows 8.1 installation. As I have tried all the things that I can imagine any suggestions would be kindly appreciated.

Upd: Meanwhile, I tried some things. First, I replaced the keyboard to see whether it may be hardware issue, but the new keyboard showed the same problems. Finally, I added an USB mouse and as it turns out now everything works like it should. So, I suspect that it is synaptic drivers issue, however, I don't know what I can do about it.