Whats the best way to work on a new computer without activating the license?

I want to add some additional hardware to a premade factory computer before I give it to someone. But I want them to be able to activate the Windows 10 license to their account.

Do I need…

Whats the best way to work on a new computer without activating the license?

Source: [H]ardOCP – Whats the best way to work on a new computer without activating the license?