The result was a prototype called "MinWin 10." It replaced the classic Explorer shell with a custom launcher (codenamed "Lighthouse"). It ripped out GDI (Graphics Device Interface) and replaced rendering with DirectX 12 Ultra-Lite. The OS booted to a command line in 2 seconds. With a community driver pack, it booted to a desktop in 6 seconds.

It was a failure. (At least, commercially.)

Officially, Microsoft has never released a consumer product called "Windows Nano 10." Unofficially, for the small subset of developers, embedded engineers, and performance freaks who have pieced together Microsoft’s discarded code, Nano 10 represents the "what if" of operating systems—a version of Windows that weighs less than a Linux distro but runs every Win32 app you own.

If you find a USB drive labeled "Nano 10" at a garage sale, don't install it on your main PC. Fire up a VM. And for two glorious hours, you'll wonder why the future of computing required so much stuff .

April 14, 2026

Have you run a Nano 10 build? Share your boot times in the comments below.