03 Jun 2008 at 20:10 - 3
You need to find the option under the NVCpl (control panel) that says "Change Flat Panel Scaling" Look at the available options. If it is already using your monitors built in scaling, switch it to "Use NVIDIA Scaling"
Also, make sure you are setup to only use one monitor. You can see that option in "Set up multiple displays" or by right clicking the desktop, going to Personalize, then Display Settings, and viewing the monitor tab. You should only see one monitor that is active. If other monitors are active, disable them via that menu or the NVCpl.
If either of those fixes do not work, then tell us so we can recommend the next step.
EDIT!: You need to have the NV Control Panel in advanced mode in order to see scaling options, or update your drivers if it is still not present.