: Visit the Windows 8.1 ISO Download page. You will need to select your edition and language to generate a temporary download link.
You're looking for a Windows 8.1 VHD (Virtual Hard Disk) download link. Here are a few options: windows 81 vhd download link
Even when running in a VHD, Windows 8.1 requires a valid product key for activation unless it is a specific evaluation version (which typically expires after 90 days). : Visit the Windows 8