Because Windows 7 Loader modifies critical system boot sectors, it requires administrative privileges to run. Malicious actors frequently package these "loaders" and "activators" with hidden malware, including: : Encrypting your files and demanding payment.
A generic, master product key specific to that manufacturer and edition of Windows (e.g., Windows 7 Ultimate).
Windows is "fooled" into believing it is running on an OEM (Original Equipment Manufacturer) computer—like a Dell or HP—that has a license tied directly to the motherboard.