Open-source Windows hardening

4 Windows hardening whose code is public under an OSI-approved license, rated for privacy with evidence. Picks first, then by score.

1. HardenTools Grade B

   A utility that disables risky Windows, Microsoft Office, Adobe Reader and LibreOffice features that are commonly abused by malware.

   GPL-3.0. Source code

2. privacy.sexy Grade B

   An open source web and desktop app that generates and runs scripts to change privacy and security settings and remove telemetry on Windows, macOS and Linux.

   AGPL-3.0. Source code

3. Win11Debloat Grade B

   An open source PowerShell script that removes preinstalled apps, disables telemetry and changes other settings on Windows 10 and 11, with options to undo changes.

   MIT. Source code

4. Windows Spy Blocker Grade B

   A Go tool that blocks Windows telemetry and tracking through firewall rules and hosts files built from captured network traffic. It is no longer actively maintained.

   MIT. Source code

Compare all 13 Windows hardening, open source or not.