You should download the update and save it to your Desktop.
You then uninstall the existing driver and reboot the PC. You will then be in VGA resolution. Then double click on the downloaded driver to install it. Once it has finished installing do the following:
• Right click on a blank portion of your Desktop.
• Select 'properties'.
• On the tab at the top click on 'settings'.
• Select your preferred screen resolution i.e. 1280 x 1024 or whatever.
• Select the Colour Quality i.e. Highest 32 Bit.
• Select 'Advanced'.
You will then have the NVidia controls to set to your personal preferences.