How to register a computer with a different name?

Here is the question of a layman:

I bought a laptop for my nephew. To activate Norton I logged in on the laptop with my name. Of course, my name now appears on the screen when I turn it on. How can I change this so that the actual owner appears there?

You need to create an account for your nephew:

https://www.heise.de/...58638.html

Where exactly does your username appear?

Do you use Windows? In that case you can create a user account on the name of your nephew and delete your…

https://support.microsoft.com/...or-account

Start - Settings - System - left on, Info '' - center Device specifications and, rename this PC ''

I assumed that you are talking about Windows 10.

Excellent!