If you can't wait on Microsoft to push .ISO files to testers for build 10041, you can create yours now:
Download the desired edition and architecture from the following link:
- Windows 10 Pro x86 build 10041
- Windows 10 Pro x64 build 10041
- Windows 10 Enterprise x86 build 10041
- Windows 10 Enterprise x64 build 10041
For persons requesting other languages, see the following thread:
Download ESD Decrypter 4.7 (esd-decrypter-wimlib-4.7z)
You can use NTLite as an alternative to convert the .ESD file into a .ISO:
Extract esd-decrypter-wimlib-4.7z to a folder.
Put the appropriate .ESD file you downloaded into that same folder.
Right click decrypt file in the same folder and click Run as administrator
Select option 1
When complete, burn to a blank DVD or create a bootable copy on a USB thumbdrive.
See article for instructions how to do that.
Persons have recommended using Rufus for best results when creating a bootable copy on a USB thumb drive.