Microsoft stopped selling Windows 8 keys, but you can still download Windows 8.1 (which is superior—it brings back the Start button and improves performance). Use the official for Windows 8.1 (available from Microsoft's Software Download page).
In the world of legacy operating systems, Windows 8 (and its popular update, Windows 8.1) still holds a niche audience. Many users with older hardware, low-RAM systems, or specific industrial software need a lightweight, 64-bit version of Windows 8. However, a standard Windows 8 ISO is roughly — too large for slow connections, USB drives with FAT32 limits, or older DVDs. This is why the search phrase "windows 8 64 bit highly compressed 11 download upd" has gained traction. windows 8 64 bit highly compressed 11 download upd