This allowed users to perform a clean install Windows 10 and enter a valid Windows 7, 8, or 8.1 key during installation.
RELATED: You Can Still Get Windows 10 for Free from Microsoft's Accessibility SiteĪs part of Windows 10’s first November update in 2015, Microsoft changed the Windows 10 installer disc to also accept Windows 7 or 8.1 keys. You Can Still Use an Old Key with the Anniversary Update