I have been searching all around for a website to download Ge-force motherboard multimedia audio controller, I did use Nvidia website but to no avail.

If it is an onboard controller chipset then the computer manufacturer's website often has the drivers for its own computers.

But the website has no direct download for Multimedia Audio controller

What's the make/model of your computer?

Edit to add: you can PM that info if you want.

Model: Ge-force 6100