I can provide a step-by-step guide for once you have your files.
Select the architectures (x86, x64, ARM64) and editions you require. windows 10 rs5 build 17618 all in one x86 x64 arm iso
Which is your primary target (PC or ARM device)? I can provide a step-by-step guide for once
Includes ARM64 support for mobile-first devices. windows 10 rs5 build 17618 all in one x86 x64 arm iso
Are you installing this on or a virtual machine ? Do you need help finding a UUP conversion tool ?
While many third-party sites offer pre-made ISOs, building your own using UUP (Unified Update Platform) files is the safest method.