Atlas OS takes this base and performs over 300+ modifications, including removing Windows Defender, disabling Cortana, removing telemetry, deleting all UWP apps (calculator, camera, store, etc.), and disabling services like Print Spooler, Windows Update, and Error Reporting.
: Official support for Windows 10-based Atlas builds is being phased out in alignment with Microsoft’s own end-of-life date for Windows 10 (October 14, 2025). Performance & Features (21H2 Era) atlas os 21h2