Windows Longhorn build 4020

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Windows Longhorn
Architecture x86
SKUs Professional
BIOS date 2003-05-08
Timebomb 2004-07-25 (+444 days)
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Windows Longhorn build 4020 is a Milestone 5 build of Windows Longhorn. A screenshot of the build was leaked on the BetaArchive Discord on 2018-11-27. also have a few images of this build[1]. On 2018-12-03, this build leaked to BetaArchive FTP by ReflectiaX, along with 4032.

This build is very similar to build 4015 (main), however there are some minor changes. The Windows Explorer no longer leaks memory, the OOBE is now completely skipped, and the Desktop Composition Engine is broken. Alongside, this builds refers itself as "Longhorn" instead of "Longhorn XP". The sidebar is given a minor change to take up the whole side, including the bottom of the taskbar, shifting the time to the left of the sidebar instead of under. The most notable newest change is the notifications, which now uses the new design from build 4029, which features a more sleeker design and the notification icon on the side bouncing up and down when hovered.



The installation media is not bootable, you must upgrade to this build from an earlier version of Windows.