Do Windows 10 updates on standby?

I would like to make updates (Fortnite etc.) on my new Windows 10 computer. Is there something like a sleep mode or standby, that you turn off the PC, and continue to load the updates?

Standby → No function, no download

Ergo → Update, computer must be running

And what happens when saving energy?

What should happen. He can save energy when he does nothing, but he does something, so he does not save energy either

Okay, so it's imperative that my PC is on?

Yes. But in idle (comparable with download) he still needs a lot less power.