- The official Windows 11 ISO files for builds 27924, 26200, and 22621 are available through the Insider Preview Downloads page.
- The ISOs are available for the Canary, Dev, and Beta Channels, letting users perform a clean install or in-place upgrade to test upcoming features and improvements.
- These preview versions aren’t final and should be used on secondary devices.
UPDATED 10/19/2025: Microsoft has made the official ISO files for Windows 11 builds 27924, 26200, and 22621 available for download through the Windows Insider Preview Downloads page. These ISOs allow users to perform a clean installation or in-place upgrade to test the latest features and improvements coming in future releases of Windows 11.
The new files include images for the Canary, Dev, and Beta Channels, giving developers and enthusiasts early access to upcoming changes and system enhancements. As always, these preview builds are not final and may contain bugs, so it’s recommended to install them only on secondary devices or virtual machines.
If you’re already enrolled in the Windows Insider Program, you don’t need to manually download the ISO files for builds 27924, 26200, or 22621. Instead, you can simply use the Windows Update settings to get the latest flight directly from Microsoft’s update servers.
Windows 11 build 27924 ISO file download
To download the latest preview build of Windows 11, log in to this Microsoft support website. Once on the download page, select the desired edition and click the Confirm button to initiate the download.
After downloading the official ISO file, use 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 an in-place upgrade.
- Windows 11 build 27924, 26200, and 22621 ISO | Download
Alongside the availability of build 27924, Microsoft is also making the same build as part of Windows 11 24H2 in the Dev Channel.
If you are looking for the latest build release or any other build, it’s possible to create a custom ISO file using the UUP tool.
Update October 19, 2025: This page has been updated to ensure accuracy and include the latest information.
Mauro Huculak is a Windows How-To Expert and founder of Pureinfotech in 2010. With over 22 years as a technology writer and IT Specialist, Mauro specializes in Windows, software, and cross-platform systems such as Linux, Android, and macOS.
Certifications: Microsoft Certified Solutions Associate (MCSA), Cisco Certified Network Professional (CCNP), VMware Certified Professional (VCP), and CompTIA A+ and Network+.
Mauro is a recognized Microsoft MVP and has also been a long-time contributor to Windows Central.
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