Hello FallenMorgan, If you go into your Control Panel then Programs & Features click on Nvidea Drivers & it will show you what Nvidea drivers you have.
Uninstall the driver you are upgrading then restart your computer.
When your computer has restarted right click on your downloaded installer and select Run as Administrator and follow the instructions, when complete restart your computer again.
If you are doing you Chipset driver as well make sure you install it before any others and restart after each driver installation.
I hope this answers you questions.