: You may find physical boxed copies or digital keys on Amazon or eBay from various individual sellers.
: Microsoft recommends moving to Windows 11 . While there is no official free upgrade from 8.1 to 11, many users have successfully upgraded to Windows 10 first using existing keys, as the upgrade from 10 to 11 is currently free for genuine licenses. Go to product viewer dialog for this item. Microsoft Windows 8.1 Professional buy microsoft 8.1 pro
If you still need to purchase it, you must rely on third-party retailers. Where to Buy Windows 8.1 Pro : You may find physical boxed copies or
Microsoft officially several years ago . Additionally, official support for the operating system ended on January 10, 2023 , meaning it no longer receives security updates or technical assistance. Go to product viewer dialog for this item
Since Microsoft and its direct resellers no longer stock this version, you can find it through secondary markets. Be cautious of "key-only" sales, which may involve stolen or illegitimate volume licenses.