https://software-download.microsoft.com/download/
Some legacy drivers, CNC machine software, and medical devices were only certified for Windows 7 or 8.1. Since Windows 7 ISO downloads are increasingly hard to find (and lack modern NVMe driver support), Windows 8.1 acts as a bridge. Part 2: What Does "Index Of Windows 8.1 ISO" Actually Reveal? When you search for intitle:index.of "windows 8.1" iso , search engines return pages that look like this: Index Of Windows 8.1 Iso
| ISO Description | SHA-1 Checksum | | :--- | :--- | | Windows 8.1 with Update (x64) - English | B16B490B7A809EC3C9F62BF230A0A0C4B4E6B8D2 | | Windows 8.1 with Update (x86) - English | BDA9C9B1EC476D46CE128C4A1E87794D913BF020 | | Windows 8.1 Enterprise (x64) - English | F7F955FC6192DBF26CE810634C5DEDB11FB6D8F5 | https://software-download