Before writing the ISO to a drive, verify its SHA-256 hash using Windows PowerShell to ensure it is a true "clean" image: Open PowerShell.
x86 is typically used for older computers with legacy processors that do not support 64-bit instructions, or for specialized industrial applications where legacy 16-bit or 32-bit software compatibility is critical.
Microsoft has made the direct ISO download slightly tricky (they push the Media Creation Tool first). Here is how to bypass that to get the raw ISO file.
Complete Guide to Microsoft Windows 10 Home i Pro x86 Clean ISO