When going to version 1607 of 10, it is reportedly supposed to be automatic:
https://blogs.windows.com/windowsexperience/2016/08/02/how-to-get-the-windows-10-anniversary-update/
but can be done by ISO:
When going to version 1607 of 10, it is reportedly supposed to be automatic:
https://blogs.windows.com/windowsexperience/2016/08/02/how-to-get-the-windows-10-anniversary-update/
but can be done by ISO: