: GitHub does not verify if a posted product key is authentic or legal to use. Microsoft provides no official service to verify third-party keys. Common Windows 8.1 Keys on GitHub

When found, these repositories are taken down within 48 hours. However, new ones pop up immediately. That’s why you see so many "mirror" or "backup" repos.

: While a text-string product key itself cannot contain malware, scripts or "activators" hosted on GitHub (like HimDek/Windows-Activator