Free, open-source Windows optimization tool with 42 tweaks, a settings panel, and built-in tools for startup, scheduled tasks, and cleanup.
Atlas-OS/Atlas
An open-source, lightweight modification of Windows that applies privacy, usability and performance tweaks through AME Wizard Playbooks.
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- 22,049
- Forks
- 778
- Open issues
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- Last commit
- 4 days ago
What is it?
Atlas (AtlasOS) is an open-source project that modifies a standard Windows installation to reduce built-in telemetry, improve responsiveness, and make the interface easier to use. It removes many commonly unneeded preinstalled applications, which can be reinstalled, and disables advertisements and a range of default settings.
Unlike a custom Windows ISO, Atlas is applied with AME Wizard, which runs a Playbook: a set of mostly plain-text scripts packaged as a renamed zip archive. Its backend, TrustedUninstaller, is open source under MIT, and the Atlas Playbook is licensed under GPLv3, so users can inspect the changes that get applied. Atlas does not redistribute a modified Windows ISO and does not alter Windows activation.
Security features such as Windows Defender, SmartScreen, Windows Update, CPU mitigations, User Account Control and core isolation are optional and can be toggled, with documentation describing the trade-offs of each choice.
Key features
- 01Removes most telemetry and applies group policies to limit data collection in Windows.
- 02Applies performance and responsiveness tweaks without disabling essential features.
- 03Removes commonly unneeded preinstalled apps, which can be reinstalled.
- 04Makes security features such as Defender, Windows Update and UAC optional and toggleable.
- 05Delivered through AME Wizard Playbooks whose scripts are mostly plain text and open source.
Use cases
- Reducing telemetry and data collection on a personal Windows PC.
- Trimming preinstalled apps and ads for a cleaner Windows setup.
- Tuning Windows for gaming or lower-latency desktop use.
- Customizing which security features stay enabled on a Windows machine.
Quick start
- 1
Read the installation guide at the Atlas documentation site
- 2
Download the Atlas Playbook from the releases page and run it with AME Wizard
Things to know
- Windows only; it modifies an existing Windows installation.
- Requires AME Wizard and a Playbook archive, so setup is a multi-step manual process.
- Does not guarantee privacy outside Windows, such as in browsers or third-party apps.
In collections
Topics
FAQ
- What is Atlas?
- An open-source, lightweight modification of Windows that applies privacy, usability and performance tweaks through AME Wizard Playbooks. Atlas (AtlasOS) is an open-source project that modifies a standard Windows installation to reduce built-in telemetry, improve responsiveness, and make the interface easier to use. It removes many commonly unneeded preinstalled applications, which can be reinstalled, and disables advertisements and a range of default settings.
- Is Atlas free to use? What license does it have?
- Atlas is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
- Is Atlas still maintained?
- Actively maintained. The last commit to Atlas was on Nov 3, 2026.
- What can I use Atlas for?
- Reducing telemetry and data collection on a personal Windows PC. Trimming preinstalled apps and ads for a cleaner Windows setup. Tuning Windows for gaming or lower-latency desktop use. Customizing which security features stay enabled on a Windows machine.
- How do I install Atlas?
- Read the installation guide at the Atlas documentation site Download the Atlas Playbook from the releases page and run it with AME Wizard
- Where can I get Atlas?
- The source code and installation instructions are on GitHub: https://github.com/Atlas-OS/Atlas
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