Find your Windows product key - Microsoft Support

product key for windows 10 Learn how to locate your 25-character product key or digital license for Windows 10 or Windows 11, depending on how you got your copy of Windows. See pictures of authentic product keys and COA labels, and contact information for hardware and software manufacturers..

windows 10 pro product key  These are NOT product / license keys that are valid for Windows activation. These keys only select the edition of Windows to install during setup, but they do not activate or license the installation.

windows 10 product key  Each Windows 10 edition has its own generic key for activation. Here's a list of free generic license keys for all Windows 10 editions.