How do you lot update graphics drivers?

On a laptop with switchable graphics, check the laptop maker's site too. Some of them want their own driver package, and the generic one can refuse to install or mess up the switching. Desktop cards, go direct. Both installers have a clean install / factory reset option as well, which sorts most weirdness without needing ddu.

use nvidia app or adrenalin rather than device manager - windows hands you whatever driver it has, which is usually months behind. only reach for ddu if something is actually broken.