Windows 12 V2

October 24, 2025

Extended support until

February 18, 2027

**Windows 12** Codename *Telluride* is the twelfth major release of Windows from its predecessor Windows 11.

## Change list

* Wide amount of customization options for the start menu including different themes to choose (Including Classic, Metro, Aero & Fluent from Windows 11).
* A successor to DreamScene.
* The Setup & Recovery screen gets an overhaul since Windows 8
* Reintroduction of desktop widgets instead of having them in the taskbar as seen in Windows 11
* Further legacy features overhauled or removed from the source code
* About Windows becomes an UWP application that can be accessed from the start menu (The Win32 version gets an overhaul though but can still be accessible from pressing **Win+R** and type in **winver.exe** on the text box)
* Version string for the Windows version in code and as in **About Windows** makes a jump from 10.0 to 12.0

## History

Microsoft announced that a newer major version of Windows would come after Windows 11 after the support for the RTM version **21H2**, said version would be both free upgrade and capable of fresh installation like how Windows 11 was. The first versions would be available to be tested via the Windows Insider Program as an upgrade from Windows 11 if the device is compatible.

## List of known builds

### Build 23900.1000 (2023-08-17)

The earliest build of Windows 12 to be found running on a computer demo for AMD's upcoming Zen 5 Micro-architecture and the capability of implementing BIG. The design cores for their consumer desktop platforms to compete with Intel's Lunar Lake architecture. Screenshots and information of this build arrived, and even a leaked ISO file came online the day as Windows 12 for insiders came out. 3 days later Microsoft would file DMCA claims (similar to Windows 11) for leaking unreleased products without previous disclosure.

### Build 24780.1000 (2024-03-11)

The first build for insiders would be announced in the Windows Insider blog page, announcing the new Windows 12 and what it could become in the future. This becomes the earliest build to come for the insider program.

### Build 24790.1000 (2024-03-24)

This build becomes a second release for the Windows Insider Program. This time you could download the official ISO from the Microsoft webpage and make a clean installation of Windows in the machine. Although the people using the OS are warned during installation of being an early stage of development for Windows, this would include the animated desktop wallpaper feature that have use of APNGs for that.

### Build 24800.100 (2024-04-15)

This build becomes a third release for Windows 12 on the Windows Insider program. Although is a minor release due to correction of major bugs regarding latency issues on games and productivity applications, and other issues on older processors that was prior to 2018 CPU releases.

### Build 24810.1000 (2024-04-26)

This build becomes the fourth release for Windows 12 on the Windows Insider program. It includes the overhauled WinPE & recovery UI based from Fluent design language seen on Windows 12 and further optimization was made for older devices to run animated wallpapers in the background without disturbing gaming/application performance. The operating system would switch back for Microsoft developers and part of the Windows community to give feedback. Despite that, Microsoft opens a program from a Twitter announcement named **Build your own Windows** where users have to give feedback to polish the next major release of Windows.

### Build 24820.50 (2024-08-26)

Windows 12 gets announced on the Windows channel and social media. And therefore it's announced for Beta channel insiders to test the build that will receive cumulative updates until the general availability for it. This includes the major features mentioned above and major optimizations with newer and slightly older devices.

### Build 24820.75 (2024-09-01)

Cumulative update with minor fixes for Windows 12.

### Build 24820.140 (2024-09-10)

Cumulative update with minor fixes for Windows 12. This would include major things seen from the Dev builds too and more.

### Build 24820.200 (2024-09-28)

General Availability build of Windows 12. Computers manufactured from the date onwards would come preinstalled with this operating system.