nVidia Driver and Crysis

First off hi everyone, new here! I recently downloaded the Crysis SP Demo. I
installed the newest beta driver (169.04) for my graphics card (EVGA 8800GTX)
and played the game in DirectX 10. I shut my computer off after playing and
when I turned it back on the next day, the resolution was at 800x600
(normally at 1280x1024), and my computer won't load the driver. What can I do
to fix the problem? I have asked Nvidia support and they haven't been able to
find the problem. I've tried system restores, and installing different
versions of the drivers. If you need any more info, please ask. All info is
helpful, thanks!