: If you bought a retail copy online, the key is located in your confirmation email from the Microsoft Store or the authorized retailer.
This guide covers everything you need to know about finding, using, and legally acquiring a Windows 8.1 product key in 2026. How to Find Your Existing Windows 8.1 Product Key windows 8.1 product key
: On some older desktop towers or laptops, look for a Certificate of Authenticity (COA) sticker on the back, bottom, or under the battery compartment. : If you bought a retail copy online,
: Check the label or card inside the DVD case or original packaging. Using Command Prompt to Retrieve Your Key windows 8.1 product key