"BlackWin OS" appears to be a specialized, custom-modified version of Windows (often referred to as a "Lite" or "Debloated" build) rather than a widely recognized mainstream operating system. These types of projects are typically aimed at gamers or power users looking for high performance by stripping away background telemetry, unnecessary services, and visual bloat. Alternatives to Custom Windows Builds
"What are you running on it?" I asked, feeling a bead of sweat trickle down my own back. The ambient temperature in the booth was rising. blackwin os alternative hot