Sets FeatureSettingsOverride to disable kernel-level mitigations for Spectre v1/v2 and Meltdown. Affects older Intel CPUs (Skylake → Coffee Lake era) most, where the mitigations cost 5-30% in I/O-heavy workloads. Modern (Tiger Lake+) CPUs have these in hardware so the cost is small. DO NOT apply on systems that run untrusted code (browsers count, but most users accept that risk).
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/troubleshoot/windows-server/security/protect-against-speculative-execution-vulnerabilities