If you’ve been waiting for Windows 10 21H1 ISOs, there’s some
good news for you. Today, Microsoft has published ISO images of
the next feature update, but there’s a catch – you need to join
the Insider program to get started with a clean installation of
Windows 10 version 21H1.
Microsoft has already confirmed that
version 21H1 comes with a few quality improvements and
there are no new features (if you don’t consider the changes
for the Windows Hello settings page).
Like the October 2020 Update, version 21H1 also changes the way
the system version numbers are used for Windows 10. Rather than
using the year and month combination as version number,
Microsoft is using ’21H1′, which is basically the year
(2021) and the first half
The ISO images for Windows 10 version 21H1 are technically a
‘preview’ of the upcoming update, but you can safely use them
if you really want the update now. Remember that there’s really
no difference between version 20H2 and 21H1, and you should not
This is because the update is based on version 20H2 and it’s
nothing more than a cumulative update for version
20H2. The ISO will bump up the build number by one and
enable improvements for Windows Hello Settings.
If you’re still interested, here’s how you can get started with
a clean installation of the Windows 10 Spring 2021 preview
How to download Windows 10 21H1 ISO images
To download Windows 10 21H1 ISO, follow these steps:
- Register or the Windows Insider program from here.
- Head to the download page on Microsoft’s website.
- Click on ‘Select edition’.
- Select “Windows 10 Insider Preview (Beta Channel)” – Build
- Select the language (make sure that you select the language
given in the Settings app > Language).
- Select “64-bit download”.
If you followed the above steps correctly, the download of the
ISO file will start in your browser. Remember that the links
will expire after 24 hours.
How to use Windows 10 21H1 ISO file
Once you’ve downloaded the media files, follow these steps:
- Open File Explorer and right-click on the .ISO file.
- From the pop-up menu, select the Mount option.
- If you don’t see the mount option, go to Settings > Apps
> Default pages, and click on “Set defaults by app”. Locate
“Windows Disc Image Burner” and set File Explorer set as
- After mounting the ISO, you should find a setup.exe
- Double-click that file to install update the current
installation of Windows.
- After the installation has finished, you’ll need to reboot
your device and build number changes will automatically reflect
in the Settings app.
It’s likely that you’ll see an ‘Insider preview’ watermark on
your desktop if you install the preview of the update. The
watermark will be removed when the update is released to
everyone, which is currently scheduled for May/June.
While the spring 2021 update has been finalized, Microsoft
still doesn’t recommend that you use it as your OS on your
primary computer. The update is technically still a ‘preview’
and builds can be buggy.
If you still want to try out the update, there’s a safe easy
way to test it: virtual machines (VMWare or Hyper-V). On
Windows 10 Pro or Enterprise, you can use Hyper-V to create a
virtual machine by following these steps:
- Open the “Turn Windows features on or off” page and enable
- Reboot your device and search for Hyper-V Manager.
Once done, create a Virtual Switch for the External network and
then configure your virtual machine.