Windows 10 Build 15035 is an expired pre-release build from 2017. It is unstable, contains bugs, and is not suitable for daily use. This guide is for educational purposes and experimental use on unsupported ARM32 devices like the original Surface RT What is Windows 10 Build 15035?
You'll need a 16GB+ USB drive and the leaked Build 15035 ISO. windows 10 build 15035 media builder
Before you spend an afternoon on this, understand that Build 15035 is not a daily driver. Windows 10 Build 15035 is an expired pre-release