Is that an acer laptop or desktop....the drivers for your card are available from click here just follow the onscreen prompts...makesure that before you install the new driver, remove the old one and re-boot the machine...
You remove the driver via control panel>add remove programs>browse to the Nvidia drivers click uninstall BUT!! choose the option to uninstall the display driver only.Then re-boot and double click the downloaded file with your new drivers. Follow the instructions and re-boot again.
On the Nvidia site navigate to the display driver downloads section, choose "Display driver" from the first screen, then choose your card from the list, then choose vista as your operating system (32 bit or 64 bit) I assume you are using 32 bit...most people are..then having made your selection click GO...download the file to an easy place to find *your desktop might be best....easy for you to find later. Then download it and follow the steps I posted before.
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