Question Windows DCH Driver Required

New build, new Windows 10 OEM installation from a brand new disk.

I go to install Nvidia driver downloaded from Nvidia, and...

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Now, this system is not mine. It is being built for someone else.

This is the first I've seen this DCH driver stuff, and from what I understand it's supposed to make things more compatible... how ironic.

Does anyone know why I wouldn't be able to install standard drivers on a brand new Windows 10 Pro 64-bit installation? Why would DCH packages be required and not optional?