A product key is a 25-character code used to activate a copy of Windows 7. It's usually required during the installation process or when activating the operating system. The product key helps verify that the copy of Windows 7 is genuine and has been purchased from an authorized retailer.
Most versions of Khatmau-sr’s Super Lite are distributed as "pre-activated" or "unlocked". However, official Windows 7 product keys are no longer sold by Microsoft as the OS has reached its end of life. Windows 7 Super Lite by Khatmau_sr (SP1, English, x86) 17 Apr 2021 —
: If you've previously installed Windows 7 Super Lite Khatmau-SR on a computer, check any documentation or emails related to the purchase for the product key.