Comment 47 for bug 1159707

Sorry, my comment disappeared, I'll try again.
My Linux Mint 18.1 Cinnamon task bar did not respond to clicks from the touch pad. Nor did the quick-launch, the system tray, or the Menu - in short, the whole bottom bar of the desktop. The Menu responded to the Windows (Super) key, but when I clicked on it, it disappeared without responding.
In the Welcome Screen, I clicked on Drivers, and, after the Driver Manager demanded my password and updated the cache, it offered me three choices of driver for my NVIDIA C77 GEForce 8200M G ( I don't know what that is - a graphics card?). On the advice in a comment above, I changed my selection from nvidia-304 to xserver-xorg-video-nouveau, an open-source driver.
This ended the above problem. What problems it causes I don't know - maybe loss of some function I don't care about.