After 5 yrs without a display problem, my I8200 has been experiencing a driver malfunction. The screen changes to a very low resolution with very large fonts etc. and the message "Windows-Display driver stopped responding" and "The NV4_Disp display driver has stopped working normally.....". When I shut down and restart the computer the display returns to normal but may malfunction again at any time again for no apparent reason. I haven't had any hardware or software changes that I'm aware off that might have triggered this problem. I haven't updated the video and bios drivers but they are described as optional. I figured why mess around with the bios when everything was working fine for years. I reinstalled the original driver with no effect. What might have suddenly caused this video driver problem?