Select , then choose the release, edition, and your desired ENU (English) language. Select x64 as the architecture and click Download .

If you specifically need an "Industry" or "Embedded" version, Microsoft still hosts evaluation ISOs on their Download Center . These are often used for specialized hardware but can be used for general testing. Key Considerations

To download a ISO, you should ideally use official sources to ensure the file is safe and untampered. Note that Microsoft ended support for Windows 8.1 on January 10, 2023, meaning it no longer receives security updates. Recommended Download Methods

: You will need a valid Product Key to activate Windows 8.1 after installation.