Microsoft is now making the ISO file accessible as a preview, enabling Insiders to test the semi-annual update via a clean install or an in-place upgrade, even though Windows 10 21H1 is still in the development stage.
Commercial clients can use the ISO file to test and verify the operating system prior to its wide release. To begin utilizing the (almost) final version of Windows 10, anyone can download it from the Windows Insider Preview Downloads website.
The sole warning is that, regardless of whether you decide to upgrade your current configuration or start from scratch, you will be utilizing the ISO file to do a complete installation of the operating system with version 21H1.
You can gain early access to Windows 10 21H1 by following the instructions in this article to download the ISO file. (You may also view this video guide that explains how to obtain the ISO file.)
Download Windows 10 21H1 ISO file
Go to the Downloads page for Windows Insider Preview.
Enter your Windows Insider Program login information to log in.
Choose the Windows 10 Insider Preview (Beta Channel) Build 19043 option under the Select edition section.
Download the Windows 10 21H1 ISO
To confirm, click the button.
Choose the language of the product.
To confirm, click the button.
Click the “Download 64-bit” button.
The final ISO for Windows 10 version 21H1 will download to your device when you finish the procedures. You must utilize the 32-bitDownloadbutton if you are using Windows 32-bit.
Once the ISO file has been downloaded, you can use programs like Rufus to make a USB flash drive bootable. You can just double-click the file to mount the ISO with File Explorer and continue with the setup if you intend to update in-place.