Dev Channel

Download Windows 10 (build 21354) Insider Preview ISO file

Microsoft makes available the Windows 10 build 21354 ISO for PC to Insiders — here's how to download it.

Download Windows 10 Insider Preview ISO files

UPDATED 4/7/2021: Windows 10 build 21354 ISO is now available for download for those who want to test the new version of the operating system using a clean installation or in-place upgrade.

Microsoft is releasing another official ISO file of Windows 10 in the Dev Channel to allow developers and enthusiasts to get early access to the next features and improvements coming later in 2021. This media is not meant to install a pre-release of Windows 10 on your primary computer.

If you’re already a member of the Windows Insider Preview program, you do not need to download the ISO file for build 21354 since you can use the “Windows Update” settings to upgrade to the latest flight.

How to download build 21354 ISO file for Windows 10

To download the latest preview build of Windows 10 with changes coming in future releases, you need to login to this Microsoft support website. Once you are on the download page, you will need to choose the edition and click the Confirm button to download the file.

After you finish downloading the official ISO file, you can use different tools like Rufus to create a USB flash drive to install the operating system. Alternatively, you can mount the ISO to begin the setup if you plan to do an in-place upgrade.

Alongside the availability of build 21354, Microsoft is also making build 19043 as part of the Windows 10 21H1 development.

If you’re looking to upgrade your computer running Windows 7, or you need to do a clean install of Windows 10, the company also makes available the ISO files for the official version of Windows 10, which you can get using the Media Creation Tool or through the Microsoft support website.

For more details, check out the complete guide with all the changes that Microsoft has been working on in the Dev Channel development of Windows 10.

Originally published in April 2016, updated on April 2021.