". . .winston" wrote:

Activation in Windows 10
http://windows.microsoft.com/en-us/w...-in-windows-10

An overview of the different types of activation.

Also see, in the same article.
- Activating the latest Windows 10 Insider Preview
- Activating Windows 10 after a hardware configuration change

"...contact customer support."

If activation after hardware changes were possible to do online, I would
consider it.