Because version 1709 is unsupported, you must take extreme precautions:
This version was the "lighting up" moment for Mixed Reality, providing built-in support for VR headsets and augmented reality experiences via the Mixed Reality Viewer. Windows 10 1709 Iso 64 Bit
Since Microsoft now pushes the latest version (currently 22H2) by default, getting a specific older ISO like 1709 requires a few workarounds: Windows 10, version 1709 now available Because version 1709 is unsupported, you must take
To run the 64-bit version of Windows 10 1709, your hardware must meet these baseline specifications: Because version 1709 is unsupported
Once you have the file (approx. 4.6–5.2 GB), you need to make it bootable.