Longhorn Build 3670 |work| - Windows

Build 3670 belongs to , a period when Microsoft engineers were essentially "throwing everything at the wall to see what stuck". At this stage, Longhorn was not a brand-new OS but a heavily modified version of Windows RC1 (Windows Server 2003) .

A new way to draw windows using the graphics card. Indigo (WCF): A new way for apps to talk to each other.

But the laptop’s screen shows one last line: windows longhorn build 3670

At this stage, the operating system was still heavily based on the Windows Server 2003 codebase (then known as Windows .NET Server). In fact, Build 3670 identifies itself in the System Properties applet as "Microsoft Windows XP Standard Server Version 2003". Key Features and Interface Changes

To appreciate what Build 3670 doesn't have, list what was removed after the Reset: Build 3670 belongs to , a period when

Before the Reset, Longhorn used the "Plex" visual style (lighter, more cartoonish). Build 3670 mostly uses Slate, but certain dialog boxes and the Windows Classic fallback still reference Plex assets.

The year is 2003. You’re a developer at Microsoft, Redmond. The air smells of stale coffee, burnt-out CRTs, and desperate ambition. The project is Longhorn —the future of Windows. The build is . And it is already a ghost. Indigo (WCF): A new way for apps to talk to each other

is one of the very first post-Reset builds. Compiled in late August or early September 2004, its full tag is usually Longhorn 3670 (idx02.040819-1215) .

Unlike later builds (like 4074), Build 3670 has to the public. Only a handful of screenshots exist, uploaded years later by members of the WinBETA community. It is currently considered a "holy grail" for collectors of beta software.