Well, daunting name aside, it’s an open-source Windows activation script that uses a combination of techniques to bypass Microsoft’s activation requirements.
For more information, see the GitHub repository. And remember, GitHub is owned by Microsoft. And still, the script remains on GitHub.
Keep in mind that this goes against Microsoft’s Terms of Service. Legal rules differ depending on where you live, so make sure you understand the risks in your area.
This question have been asked multiple times before, here’s a summary.
Quote
MAS is fully open-source, with over 150K stars on GitHub and millions of users worldwide. You can open the batch files in Notepad to review the code yourself, or ask others who have already reviewed the code.
Massgrave is hosted on a website owned by Microsoft themselves (GitHub) for more than 10 years and their technical support uses it themselves – if you have trouble activating your legitimate Windows license for example, their team will often use Massgrave to activate Windows. If that isn’t safe I don’t know what is.
If you’re not totally sold on pirating Windows, you might want to consider alternative solutions, like the Fedora Workstation with the GNOME desktop environment. Learn more about Fedora Workstation.
I’ve turned my Lenovo ThinkPad T14 into a Fedora Workstation, and it runs incredibly well.
Other alternatives include the Ubuntu desktop environment, or Linux Mint Linux Mint.
