Windows 10 Anniversary update is due for this summer, but before that company has released the another build of it which will take you really close to what you will have in Anniversary update of Windows 10.
Windows 10 Insider Preview build 14376 and users who have selected to receive the update in the fast ring can download this update right now via navigating to Settings App -> Update & security -> Windows Update -> Search for latest update and download and install it.
This build comes with minor changes and fixes for Windows 10 PC and you can check for all the details on the announcement made Donna Sarkar on Windows blog.
ISO Images of Windows 10 Insider Preview Build 14376
Lyraull on Twitter has shared a bunch of ISO images of Windows 10 Insider Preview Build 14376. You can find the links in the following Tweet:
— Lyraull (@Lyraull) June 28, 2016
Alternately, if above link is not working or dead, then you can create ISO image yourself.
You just need to follow the steps mentioned in upcoming line:
1. Download the official .esd files of Windows 10 Insider Preview build 14376 released by W.Z.T and Dona Sarkar. Check the following tweet for links to download .esd files.
— WZor (@WZorNET) June 29, 2016
2. Once you got the .esd file you need to convert it into ISO image using the following tutorial How to Convert Install.esd file to ISO.
3. Once you got the ISO image, simply create the Bootable Windows 10 USB,
4. Perform a Clean install of Windows 10.
I hope you find it useful and sorry for not sharing ISO images of Windows insider preview build 14676.