HP SFF PC crashing when playing web based videos in Full Screen

Hi There!

I have a very frustrating issue I am at a loss how to resolve... 

I have a HP 8300 SFF PC with 6GB Memory, i7 3770 Processor and a 250GB SSD. 

http://h20565.www2.hp.com/portal/site/hpsc/public/psi/home/?cc=uk&lang=en&sp4ts.oid=5232852&ac.admitted=1387414580954.876444892.492883150

I run Windows 7 x64. 

Installed in this computer I have installed a NVIDIA NVS310 which has 2 x Display Port which are plugged into 2 x ZR2740W Monitors which run at 2650x1440.

LEADTEK NVIDIA QUADRO NVS 310 512MB DDR3 64BIT PCU-E 16X GRAPHICS CARD

Multiple times a day I get both screens going blank, and a message comes up stating that the nvidia driver has stopped working and recovered.  Other times both screens go off and the PC needs to be powered off to get operational again. 

Seems to happy a lot with YouTube and Gametrailers.com and other videos from the internet. I use Chrome. 

All my applications are updated and I have the latest drivers. The problem has been going on for as long as I've had the computer, which is about 9 months.