HP Dual Monitor Issue

I just upgraded to Windows 8 on my HP Pavillion dv6815nr. I am not having any luck connecting it to a second monitor. I followed the basic steps under "screen resolution", but my computer is not identifying the second monitor. I read that you need to go to Nvidia's control panel to connect to a second monitor, but I cannot seem to find that with the driver I currently have installed. HP's website does not have an update for the Nvidia driver for Windows 8 for my particular computer. I am using a VGA cable if that makes any difference. The computer originally had Vista and I never had any issues connecting to a second monitor. Does anyone have any useful pointers?

Thank you!

I take it you have the Microsoft nvidia drivers installed?

These drivers are very generic....

Install the latest nvidia drivers from either nvidia or from your laptop manufacturer.

That should give you the full nvidia control panel.

Install the drivers for windows 7 using compatability mode.

HP's website only has drivers for Vista.