If your computer is powered by a Nvidia graphics card you have probably also installed the driver package that Nvidia makes available for various operating systems.
The package has currently a size of nearly 380 Megabyte and one of the reasons for that is that it includes several components and not only the graphics driver.
If you select to do a full installation in the installer, you end up with installed drivers for features that you may not be able to use at all.
If your monitor does not support 3D for instance, you can't really make use of the 3D drivers that get installed anyway on your system. Another example is the audio driver that you only need if you use the card's audio capabilities.
Then there is GeForce Experience, a new software that requires registration. Initially designed to offer configurations for games to improve performance or visuals, it has since been pushed to be a lot more than that. It is now used for instance to download and install updates automatically.
Even if you do not use the drivers, they may be loaded with the operating system and features they offer may be displayed in various menus of the operating system.
It is therefore highly recommended to custom install Nvidia graphics drivers and not use the express installation option that the installer offers.
If you select custom (advanced) installation in the installer you are taken to the next page where you can block several driver components from being installed on your system.
While you need to install the Graphics Driver, you are free to block the installation of any of the other components the installer makes available to you.
I disable all features but PhysX during installation to avoid installing drivers that I do not need on my system. I suggest - highly - that you also check the perform a clean installation option unless you have created profiles that you want to retain.
You can download the latest Nvidia drivers from the official website.
Update: You may notice the two processes nvvsvc.exe and nvxdsync.exe running on your system even after you have only installed the modules that you needed to install using the custom installation option.
You can disable both process by stopping the NVIDIA Display Driver Service. When you do that, you won't be able to access the NVIDIA control panel anymore. I have not experienced any other issues doing so however.
This stops both processes for the current session. I suggest you do that for a couple of sessions to see if there are any other side-effects of turning the service off.
If there are not any, you can go back to Services and disable the service by right-clicking it, selecting Properties from the context menu and switching the startup type to disabled there.
Update 2: You may have noticed the processes nvbackend.exe and nvstreamsvc.exe running on the system as well. Follow the link to find out how what they do and how to remove them.
Update 3: Recent Nvidia drivers add other processes to the system after driver installation. You find the new NVDisplay.Container process there which powers the Control Panel applet now.
You can disable it in the following way:
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