Activation on a used computer

I bought a used custom made desktop (i5 4670K and Asus z97 - AR) with Windows 10 Pro installed and activated.
First thing I did was a Clean Install (Win 10 pro 1909), deleting all partitions on the drive. When I finished the installation it was activated.
As I intend to sell the computer to a friend, how can I guaranty to the new owner that it will have Win 10 pro activated forever?
Is there a way to retrieve more information about the license that is on it?

Its tied to the pc so it will work sold a few with no problems even with a different email

Once there is a license on the Microsoft servers then drives and motherboards can be replaced.
OEM or retail or any other type should continue to work on the computer.

Run the V2 log collector.
It will display the type of license.
BSOD - Posting Instructions

https://support.microsoft.com/en-us/...ardware-change

Thanks Samuria.
I was thinking that the original owner could cancel and transfer the license to another computer. Isn't that possible?

A retail license can be used on any PC.
It is not married to the motherboard.

Local pawn broker type store sells hundreds with no problems

zbook said:

A retail license can be used on any PC.
It is not married to the motherboard.

How do I find out if the original license was a retail one?

How do you take it off the old machine?

A retail license can be used on any PC.
It is not married to the motherboard.

Megahertz said:

How do I find out if the original license was a retail one?

Please run V2 on the applicable computer and upload results into the thread:
BSOD - Posting Instructions

Thanks Zbook,
Right now the computer is packed on a box. I'll probably have time to run V2 on the weekend.