Microsoft has now released Windows 10 Redstone 2 Build 15042 to Insiders in Fast ring. You can read what the build brings in terms of changes, new features, fixes and also known issues by clicking here.
Official ISO images of the Build 15042 are available now and you can download them by clicking on the link below. You can refer to our tutorials on how to create bootable USB drive and how to do a fresh Windows 10 installation.
You can however download official UUP files for Windows 10 Build 15042 and can convert it to ISO as detailed in our updated step by step tutorial here.