Searching for a "GitHub verified" Windows 8.1 product key is a common but risky endeavor, as "verified" on GitHub usually refers to a user's identity or a commit's authenticity, not the legality or functionality of a software license.
Some "activators" encrypt your files and demand payment. Since you ran the script with administrative privileges, the ransomware has full access. windows 81 product key github verified
Use Your Windows 7/8 Key: Often, valid keys from Windows 7 or the original Windows 8 can still be used to activate 8.1. Searching for a "GitHub verified" Windows 8