How to restore windows 10 activation?

Question

Windows

Before the free transition from non-activated wines 7 and 8 to 10 with a license, I installed 8.1. I don't use activators.
Everything was fine, Windows 10 was activated and updated without problems. Then I had to suddenly demolish Windows, not having time to write down any data on the activation of dozens.
Tell me, is it possible to restore activation, having only a Microsoft account and the same PC configuration, or do you need some other data?

Answer 1

Activation will happen automatically after reinstalling Windows 10.

Answer 2

Activation itself must occur.

Before a free transition from non-activated wines 7 and 8 to 10 with a license

If you have a license, you don’t have to worry at all, call Microsoft by phone to activate it.