Microsoft no longer sells Windows 8.1 directly, as official support ended on . Because it is a legacy operating system, you can only purchase it through third-party retailers. Where to Buy Windows 8.1 64-bit

: Stores like Arsenals+ sometimes carry remaining stock of specialized versions like the "Get Genuine Kit".

If you already have a standard version of Windows 8.1 and want to upgrade to "Pro" or add specific capabilities, you can use the tool:

: Avoid buying "Product Keys" sold by themselves for suspiciously low prices, as these are often stolen, pirated, or volume licenses not intended for private use. Windows 8.1 Pro Feature: "Add Features"