Have you found a supposedly working key on GitHub? Before using it, check the SHA-256 hash of any executable on VirusTotal. For plain text keys, attempt to activate via Settings > PC Settings > Activate Windows. Error code 0xC004C060 means the key is blocked. Do not proceed.
Common tools and scripts found on GitHub use the following "under-the-hood" techniques: windows 8.1 product key github
: (Get-WmiObject -query 'select * from SoftwareLicensingService').OA3xOriginalProductKey . Have you found a supposedly working key on GitHub