You should run that display at it's native resolution of 1680 x 1050 for best results under normal conditions. Check your video card driver version. Your Vista version description is WTF? You either have 32-bit or 64-bit, please clarify. 62-bit does not compute.
The latest driver version for that card is 177.79 released on July 29. Go here if you need to update....
Drivers - Download NVIDIA Drivers