Microsoft has moved past public hosting of older ISO files on their main consumer landing pages. However, several legal and functional channels still exist to obtain the official, untouched ISO file. Method 1: Rufus (Recommended)
If you have an original PC from 2017–2018 that shipped with 1709, the manufacturer may provide recovery media (Lenovo, Dell, HP support sites). windows 10 version 1709 build 16299 download
System requirements and compatibility System requirements for 1709 were consistent with prior Windows 10 releases: a 1 GHz processor or faster (or SoC), 1 GB RAM for 32-bit / 2 GB for 64-bit, 16 GB (32‑bit) or 20 GB (64‑bit) storage, DirectX 9 or later with WDDM 1.0 driver, and a display capable of 800×600. Some features (e.g., Windows Mixed Reality) had higher GPU/CPU and peripheral requirements. Device drivers and firmware needed to be compatible; vendors sometimes released updated drivers to address regressions or enable new features. Microsoft has moved past public hosting of older