For historians, it remains a beautiful, broken gem—a reminder that every successful operating system is just the ghost of a much stranger idea that died along the way. Have you ever tried a pre-release build of Windows? Share your stories in the comments below (on the original blog platform).

The original plan was codenamed "Midori" and later "Immersive." The goal? Not to add a touch layer on top of Windows, but to replace the desktop entirely.

Build 8045 (fbl_core1_kernel_npc_extend_20110708) is the most complete surviving artifact of that original vision. If you install Build 8045 on a virtual machine today, your first reaction won't be "This is slow" or "This is buggy." It will be: "Where is everything?" 1. The "Hidden" Desktop In Build 8045, the traditional Windows desktop is not the default. It’s not even easy to find. Upon boot, you are dropped directly into a very early version of the Metro (Modern UI) Start Screen . There is no taskbar. No desktop icons. No "Start" button.

By: OS History Desk

In the long, winding road from Windows 7 to Windows 8, there is no single build more misunderstood, more controversial, or more tantalizing than . Leaked years after the official release of Windows 8, this pre-beta version from early 2011 offers a chilling "what if?"—a glimpse of a version of Windows so radical that even Microsoft itself got scared.

Microsoft had built a feature internally called (a Matrix reference). This was a software switch that turned the "Immersive" UI on or off. In Build 8045, if you disabled Redpill via a registry hack, the OS transformed back into a boring, normal Windows 7-like desktop with a blue taskbar.

In 2011, touchscreens on desktops were expensive. Trackpads on laptops were terrible. And enterprise IT managers threatened open revolt if they had to teach 10,000 employees how to find a hidden desktop.

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