: Separate ISO files are available for "Defender On" (full protection) and "Defender Off" (maximum performance).

: Version 5.1 offers users the choice between two separate ISOs: one with Windows Defender enabled and one with it completely removed for maximum performance.

Since "X-Lite" generally refers to custom Windows modifications created by developers in the OS optimization community (similar to projects by Ghost Spectre, Tiny10, or Repackagers), this review focuses on the common features, performance benefits, and risks associated with this specific "Optimum" v5.1 build.

Lower latency and fewer background interruptions mean more consistent frame rates (FPS).