Linux Mint graphics driver issue

I just installed Linux Mint 17 Cinamon on my PC. All went well until a few minutes after rebooting the screen went all wierd! I don't really know how else to describe it, funny squares all over the place. It seems to be a driver issue with the Nvidia Cards possibly linked to having a dual monitor setup. I'm running a GTX 660. A simple fix seems to be to disconnect one monitor restart the machine and change drivers. I opened the Driver Manager from the Administration menu and changed my driver to nvidia-331. No problems since then.