Windows Longhorn Build 4011 Official

Because for a few fragile minutes, you’re not using an operating system. You’re using a . Have you run Longhorn build 4011? Share your crash stories in the comments below.

Build 4011 (leaked in May 2003, compiled on March 27, 2003) arrived in the middle of this ambition. It wasn’t an alpha—it was a pre-alpha, a "developer preview" meant for internal testing. It is famously unstable. It is famously incomplete. But it is also the first build where you could see the future. Boot up 4011 in a VM today, and you’re greeted by the familiar XP boot screen, but the moment the desktop loads, you know you’re somewhere else. windows longhorn build 4011

is active. Gone is XP’s bright Luna blue. In its place is a dark, glassy, silver-and-blue taskbar with a glowing, gelatinous Start button. It looks like mercury and jelly had a baby. The window title bars are thick, metallic, and feature a “slab” effect—rounded on the left, squared on the right. It’s raw, unrefined, but unmistakably the precursor to Vista’s Aero. Because for a few fragile minutes, you’re not