WinSystemHarden

WinSystemHarden is a free, offline system hardening tool for Windows 10 and 11. It applies 32 hardening rules based on CIS Benchmarks and NSA guidelines to close high-risk ports, disable vulnerable services, and tighten system configurations.

Three hardening plans are included: Standard, Deep, and Custom. If anything breaks, one-click rollback restores your system to any previous restore point. No cloud, no telemetry, no sign-up required.

Everything runs locally — your system details never leave your machine.