It should be an option in the configuration software for your graphics card
And I can find that where? (Geforce 9300 GE)
I'm guessing with a Nvidia card the configuration will show a little green/(black?) eye thingy in your taskbar, right click on that and then try and find the option to open the config menu or there might be an option from the right click menu. I'm not sure since I use an ATI card

You might only have the driver, if so you should be able to download the configuration tool from the nvidia website.
*Edit* I think you can only get the driver and the configuration tool in one download with the nvidia software so you should have it.