Microsoft Activation Scripts: https://massgrave.dev/
What Is MAS?
MAS (Microsoft Activation Scripts) is a fully open-source Windows and Office activation tool distributed as batch scripts. It implements multiple activation methods that operate against Microsoft’s software licensing subsystem (SPP / OSPP / CLIP) to activate Windows and Office without a purchased product key.
https://deepwiki.com/massgravel/massgrave.dev/2-microsoft-activation-scripts-(mas)
There are many exits, some clearly marked, others less so, but none of them lead anywhere.