Sigma OS

Sigma OS

Crusty Windows bootleg
The desktop of Sigma OS
Original OS	Windows Longhorn Build 4074
Release date	March 8th, 2013
Author	techvortal
Country	Poland
Language(s)	English
Architecture(s)	x86 (32-bit)
File size	1.1 GB
Download link	Sigma OS 3.0 M6.iso
Date added	December 27th, 2021

Sigma OS is a series of mods based on Windows Longhorn designed to make it more stable and "usable". It was created by techvortal. The latest version, M6, which is based on Longhorn build 4074, was released on March 8, 2013. It was added to the archive on December 7, 2021.

Description

The bootleg itself is based on Longhorn build 4074, which was a Milestone 7 build of Windows Vista, which released in April 2004, before the development reset. The OS is mostly stock except for some integrations, icon replacements, and themes. Certain programs are taken from other Longhorn builds in order to make it more "stable".

Changes from Longhorn 4074

• The default theme has been replaced with a theme called "Aero mod" by urban92.
• Some Longhorn updates have been added.
• The cursor has been replaced with the one from Windows Vista build 5384.4.
• The sounds have similarly been replaced with the ones from Windows Vista build 5384.4.
• Some icons have been replaced with ones from Windows Vista.
• The 180 day timebomb from the original build has been removed, so you do not need to change the date to use this mod.

Software

• 7-Zip 9.20
• Paint.NET v3.36
• Opera 12.14

Notes

• Windows Update is not present.

Gallery

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  Setup

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  Installation

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  First boot

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  Empty desktop

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  Empty desktop (with Aero)