Companion to the FeatureSettingsOverride tweak. Sets FeatureSettingsOverrideMask = 3 so Windows honours the override. Per the Microsoft Spectre/Meltdown KB.
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